Questions

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548
Location
Texas
Ok, here goes! I just put Delvac 1 in my truck, it has 9k on the engine, how long should I wait to do a UOA? Whats the fundmental difference between a 0W30 and a 5W40 that would raise the oil pressure by 5psi at operting temp? Finally, seeing that my engine is still breaking in, can I leave the oil in for an extended time-or should I change it regularly? Ive searched this site quite a bit and have absorbed a lot of info, and actually understand about 1/3 of it! So your help is greatly appreciated!
 
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2,480
I would go the "normal" recommended service interval...eg. 7.5k and then do a UOA. The Delvac 1 can take it.
 
Messages
1,759
Location
Elizabeth City NC
Thicker oil will definitely improve your oil pressure. Your are seeing 30 vs 40 difference. I see this with my TR3 which has an actually oil gauge that is very sensitive. This is a great oil you are using so 6000-7500 would be a fine change interval on this stuff. You really are past quick flush changes at 9000 miles. These are good early like at 1000 miles and 3000 miles. [ December 16, 2003, 06:15 PM: Message edited by: TR3-2001SE ]
 
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