Im not sure. My blackstone report said that I could go further than 7500 miles, but i havent done it. But they definatly say that i can go further than that. So its up to you and your driving style.
If you do not have a separate bypass filter, the Fleetguard LF9027 Venturi filter is your best alternative. Stratapore synthetic media full-flow section, with built in bypass filtration section.
If you do have a separate bypass filter, then the Fleetguard LF3974 stratapore synthetic media filter is best.
Either of these are designed for extended service intervals.
I have been using Rotella synthetic for quite some time - I use NAPA Gold filters (Wix) Said to be one of the best - about 13 bucks each. I run between 5,500 and 7000 between changes - Blackstone report say I can go farther than 7,000 easily. Report says my PSD almost like new at 100K - Everything well below the normal wear and tear. Maintenance is the key to long life on these engines
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