burning oil

chops

try a different oil if you guys are burning. i used mobil1 5w-30 (NOACK = 11-13%) my first few oil changes because i didnt know any better and burned so much oil. switched to pennzoil ultra (the old one, not the newer pureplus one) and immediately stopped burning oil. the reason for that i suspect is due to the low NOACK value of the old pennzoil ultra (NOACK = 6.4%)

the newer pennzoil ultra pureplus has a much higher NOACK of 11.5% so i cant comment. however, ive moved to the 10w-30 version which has a super low NOACK of 5.7%. no burning oil so far and i'll have a UOA done in a few months when i hit the 6k marker

MJB

Yeah, I use 0W-40. The oil isn't as thin as 5W-30 when it gets up to operating temp, therefore maybe it won't pass by the rings if you guys are burning oil. I've used it for about 14k miles now. No issues at all. Doesn't the GT-R come from the factory with 0W-40?

__________________
09 Nismo #0483 sold. Viper or C7 next time around.

kenchan

now that your engine is sealed(?) wat happens if you go back to mobil1 5w30?
the thing is, my z isnt burning that much oil with the m1 5w30's.

chops

yep. mobil1 doesnt publish their NOACK values, but from what ive seen 0w-40 is in the 8-9% range. its an ok value, but its overall a great oil. i wouldnt run 0w-40 in our cars though unless you're FI'd though. its significantly thicker at operating temp versus a standard 5w/10w-30. your engine may lose some power due to the added thickness.

everyones engine is different . going purely by my own anecdotal evidence, in the last 30k miles, i havent burnt any oil. fill up at 6 quarts just to the top of the dipstick and 6k miles later, i still have the same line on the dipstick

kenchan

wait, you use 6qts?

chops

oil cooler

kenchan