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[TheHammer69]

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With synthetics how far between oil changes can you go? Can you get it at checkers or where is the best place to buy it?

C.J.

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There is only one retail bought synthetic that I normally recommend and that is Shell Rotella synthetic 5w-40 which can be found at WalMart. If you can find Chevron Delo 5w-40 or Valvoline Premium Blue Extreme 5w-40, they should work good too. The synthetic oil I recommend over everything else is Schaeffer's 9000 5w-40 which can be bought from Dp-tuner and specializedlubricants.net I'm not a big fan of Mobil 5w-40 wether it be Delvac-1 or T&SUV because they are so inconsistant in their additive pack from batch to batch. One batch will look good, another lot number will look weak.

As far as how long you can run them, first of all, if you do plan to do extended drains, install a bypass filter to minimize build up of insolubles. Second of all, back your extended drains up with Used Oil Analysis to ensure you are not overextending your oil because all engines shed wear particles in differing amounts. With all that being said, you can probably run most syns at least 10000 miles and sometimes much longer.

Hammer