Oil for the 7.3L - Page 2 - Diesel Forum - TheDieselStop.com
'99 & up Upgrades and Aftermarket - 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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post #16 of 27 (permalink) Old 09-13-2018, 07:21 AM
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Originally Posted by ArcticDriver View Post
Do you have any UOAs to post?

Is your motivation cost savings?

IIRC, your driving conditions are “severe” as defined by the Owners Manual?

Thanks
No UOAs to report. I did some a while back and things were fine but anymore I'm just going by what I feel is a good, conservative time and mileage frame for what most people running full synthetic and bypass systems do. Motivation? I was motivated primarily by wanting to cut down on the amount of supplies I had to haul down here (Mexico) to change the oil and filters. One full oil change every 20,000 is a lot less oil and filters than every 5000 as I was doing before. It does come out a little cheaper, too, which is a nice side benefit but not the primary motivation. Also, I like having a high quality oil in the motor and the Mobile One filters have a better filtration rating than the OEM Ford ones IIRC. I also like the cold weather starting ease that comes with the full synthetic oil as well. And, yes, according to the manual my conditions are "severe."
Thanks for the insightful response.


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Noco Mod. Michelin Defender LTX 285/75/16.

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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #17 of 27 (permalink) Old 09-13-2018, 07:23 AM
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You have found a good price...Lol
"I know a guy." Lol
He'll sell to anyone that wants to call/text him. Same prices as if it were someone else.

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1994 F350 7.3 PSD 4X4 ZF5 DUALLY
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2010 VW JETTA TDI DSG Kerma tune. Hankook ventus v2 concept 2.


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post #18 of 27 (permalink) Old 09-29-2018, 11:50 PM
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I use wallmart 15/40 and change it once or twice a year. Bought the truck with 125000 km and now has 470000
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post #19 of 27 (permalink) Old 11-22-2018, 09:58 PM
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late to the party but I use chevron delo from walmart, Mobil delvac is also very good and is now cheaper around $10/gal. I used rotella when i first bought my truck in 06 I like chevron/delvac much better. made my engine louder/noisier. won't touch the stuff after.

Big R, tractor supply, etc have sales on mobile delvac where you can get it extremely cheap if you can afford to buy by the pallet. I use baldwin filters but would prefer fleetguard or donaldson...just my opinion

03 F350 7.3L Auto CC LB Dually 410's (LS Rear)

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post #20 of 27 (permalink) Old 11-23-2018, 12:01 AM
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late to the party but I use chevron delo from walmart, Mobil delvac is also very good and is now cheaper around $10/gal. I used rotella when i first bought my truck in 06 I like chevron/delvac much better. made my engine louder/noisier. won't touch the stuff after.

Big R, tractor supply, etc have sales on mobile delvac where you can get it extremely cheap if you can afford to buy by the pallet. I use baldwin filters but would prefer fleetguard or donaldson...just my opinion
Exactly the same for me.
Started with Rotella T6.
Engine sounded better on DELO 400 LE 5w40:
https://cglapps.chevron.com/msdspds/...&docFormat=PDF

WalMart quit stocking the LE right about the time I switched to DELVAC 5w40 in 5-gallon buckets for $125 minus a $60 rebate which is still active until end of 2018.

The only inconvenience is the 5-gallon pail. Best to use a hand pump or pour into a 4-quart steel oilcan with spout:
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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Noco Mod. Michelin Defender LTX 285/75/16.

SOLD:
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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.

Last edited by ArcticDriver; 11-23-2018 at 11:13 PM.
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post #21 of 27 (permalink) Old 11-23-2018, 01:37 PM
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At a 20K OCI with a good quality synthetic, I wouldn't be worried about engine wear... I'd be worried about the depletion of the anti aeration additive package and the reduced performance of the oil... not as a lubricant, but as a hydraulic fluid providing the motive power for the injectors... where entrained air from the constantly churning oil would likely reduce the effectiveness of the oil's hydraulic function. Not a concern in a common rail fuel system, but something that International often said is a concern with a HEUI system.
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post #22 of 27 (permalink) Old 11-23-2018, 08:45 PM
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And unfortunately quite a few CK4 oil’s are under 1k of zddp to help cat/DPF life.

Some are still ok.

99.5 f250 7.3 4x4- 277k FF 160/30, Hydra w/SDK Tunes, S&B CAI, 4" Exhaust, Van turbo w/Riffraff Billet wheel, Autometer Gauges, Built Trans, Trucool Max, 08 Tow Mirrors.


Dads-2000 f250 7.3 4x4- 118k K&N Intake w/Amsoil Filter, 4" Exhaust, Autometer Gauges, Superchip 1705 (Tow Safe), BD Billet Wheel, TruCool Max, 08 Tow Mirrors.
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post #23 of 27 (permalink) Old 11-23-2018, 09:20 PM
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I was running Rotella T6 5W-40, but that was before CK-4 oils came out. I still had a pretty good stash of CJ-4 oils to work with, but I've only got enough for one more oil change.

I'll steer clear of CK-4 oils. Next time I buy oil, it'll be Schaeffer Supreme 9000ô Full Synthetic Oil 5W-40, it's still CJ-4, for now. If I'm on the road and need oil, I'll stick with the WSS-M2C171-F1 oils with the Motorcraft logo on the bottle.

For filters, here's what I've found...
The absolute most efficient primary lube oil filter you can get for a 7.3 is the Donaldson DBL7405. (intended for a Caterpillar 3406) It's rated at 7 microns nominal, and 15 microns absolute. But this filter gets dented by my front suspension when it flexes, so I don't run it anymore.

The second most efficient filter I can find is the Donaldson P550371, it's rated at 17 microns absolute.

The third best I can find is the OEM Motorcraft FL-1995, according to Ford's website it's 18 microns absolute.

There's a lot of hype about the Wix 51734XE & Napa 1734XE oil filters, but the published beta ratios are 4 @ 10 microns (absolutely incredible) and 75 @ 30 microns (less than mediocre). I'm inclined to think they've mistyped something because that's a wide range of good-to-bad performance in a single filter.

2002 F-250 CCLB 4x4 XLT, 7.3, ZF-6 with Midwest Short-throw shifter, ESOF, 3.73 R&P, HPx line, FRx, Racor prefilter before pump, Amsoil bypass filter, Coolant filter too
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post #24 of 27 (permalink) Old 11-23-2018, 11:15 PM
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Originally Posted by NYB View Post
At a 20K OCI with a good quality synthetic, I wouldn't be worried about engine wear... I'd be worried about the depletion of the anti aeration additive package and the reduced performance of the oil... not as a lubricant, but as a hydraulic fluid providing the motive power for the injectors... where entrained air from the constantly churning oil would likely reduce the effectiveness of the oil's hydraulic function. Not a concern in a common rail fuel system, but something that International often said is a concern with a HEUI system.
Excellent consideration.


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Noco Mod. Michelin Defender LTX 285/75/16.

SOLD:
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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #25 of 27 (permalink) Old 11-23-2018, 11:19 PM
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And unfortunately quite a few CK4 oil’s are under 1k of zddp to help cat/DPF life.

Some are still ok.
OK, I know you guys have heard it from me a dozen times already but thats why I bought 40-gallons of the Delvac 5w-40. I had to hit every Murdochs Ranch Supply along the Front Range and Laramie to get every bucket left of the CJ-4 inventories.

I know...probably much ado about nothing 😉


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Noco Mod. Michelin Defender LTX 285/75/16.

SOLD:
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2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #26 of 27 (permalink) Old 11-23-2018, 11:21 PM
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Originally Posted by txgp17 View Post
I was running Rotella T6 5W-40, but that was before CK-4 oils came out. I still had a pretty good stash of CJ-4 oils to work with, but I've only got enough for one more oil change.

I'll steer clear of CK-4 oils. Next time I buy oil, it'll be Schaeffer Supreme 9000™️ Full Synthetic Oil 5W-40, it's still CJ-4, for now. If I'm on the road and need oil, I'll stick with the WSS-M2C171-F1 oils with the Motorcraft logo on the bottle.

For filters, here's what I've found...
The absolute most efficient primary lube oil filter you can get for a 7.3 is the Donaldson DBL7405. (intended for a Caterpillar 3406) It's rated at 7 microns nominal, and 15 microns absolute. But this filter gets dented by my front suspension when it flexes, so I don't run it anymore.

The second most efficient filter I can find is the Donaldson P550371, it's rated at 17 microns absolute.

The third best I can find is the OEM Motorcraft FL-1995, according to Ford's website it's 18 microns absolute.

There's a lot of hype about the Wix 51734XE & Napa 1734XE oil filters, but the published beta ratios are 4 @ 10 microns (absolutely incredible) and 75 @ 30 microns (less than mediocre). I'm inclined to think they've mistyped something because that's a wide range of good-to-bad performance in a single filter.
There was a time I used to know what all that meant.

😉


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2002 F-250 4x4 CC SB 7.3 PSD w/4R100. 182,000 miles.
NOS Black CPS. ScanGauge-II, AIC, Bilstein 5100, Stancor GPR, Marinco Mod, B&W Turnover Ball, Michelin Defender LTX


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2002 F-250 4x4 SC LB 7.3 PSD w/ZF-6. 177,000 miles.
NOS Black CPS. ScanGauge-II. Bilstein 5100. Noco Mod. Michelin Defender LTX 285/75/16.

SOLD:
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
2000 F-250 4x4 SC SB 7.3 PSD w/4R100. 164,000 miles.
NOS Black CPS. Rebuilt Fuel bowl w/gold spring, 6.0 Cooler, Walker BTM, Stancor GPR, Michelin LTX M&S2.
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post #27 of 27 (permalink) Old 11-23-2018, 11:33 PM
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Rotella 5w-40 is around 1100 ppm of each zinc and phos

Delo 5w-40 is around 680 zinc and 750 phos Yikes

Yet delo claims 70% better wear protection.

The ck4 is supposed to have better anti aeration additives

99.5 f250 7.3 4x4- 277k FF 160/30, Hydra w/SDK Tunes, S&B CAI, 4" Exhaust, Van turbo w/Riffraff Billet wheel, Autometer Gauges, Built Trans, Trucool Max, 08 Tow Mirrors.


Dads-2000 f250 7.3 4x4- 118k K&N Intake w/Amsoil Filter, 4" Exhaust, Autometer Gauges, Superchip 1705 (Tow Safe), BD Billet Wheel, TruCool Max, 08 Tow Mirrors.
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