Quote:
Originally Posted by CappAttack
Got the oil changed last night. Manual says to use either 5w-40 or 5w-30; sticker from the last change says they used 15w-40. I used 0w-40 any thoughts or ideas on me using 0w-30 next time?
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Does the manual specify synthetic oil and long change interval? 5w-40 is (I think) only available in full synthetic because of the wide viscosity spread, and that particular weight, along with 15w-40, is a diesel truck oil which, not being API certified, usually contain higher levels of anti-wear additives zinc and phosphorus. Because it's an older car, designed for an older oil which would have contained more of those additives than current API SN (maximum phosphorus limit has been steadily reduced, from 1400ppm in SL to 800ppm in SN), I would default to a truck oil in 5w-40 myself. ETA: since 5w-40 is readily available here; I've never seen 5w-30 on the shelf locally.