Oil!!! [Archive] - SaabCentral Forums

: Oil!!!

13th April 2006, 11:07 AM
I'm running 5 40 fully synthetic oil on my 1990 carlsson and am woundering if it's the reason a have really noisy tappets? Also is it safe to switch from fully synthetic? as i was told once you use synthetic, anything else will damage the engine. What would be a good oil to use? i live in the neartheast of england so it can get quite cold (freezing in fact) and every now and then really hot.

Thanks for your time

Jim Mesthene
13th April 2006, 11:23 AM
Use 10-30. Synthetic or refined doesn't matter.
SAAB recommends 10-30 because viscosity extenders reduce the oil's ability to resist coking.