Originally Posted By: saturnsc2
Originally Posted By: Nickdfresh
If you use a synthetic, the "thicker" ones like SYNTEC 0W-30, Mobil 1 0W-40/High Mileage 10w30 are said to be your best bet...
my car calls out for 5w30, so i bought valvoline synpower full synthetic 5w30. i'm waiting to do my next oil change.
I used both oils with no problems and your engine isn't particularly sensitive. Some even used 15w40 HDEO in summer months, although for most this is overkill unless you're burning a lot of oil. In any case, every oil I listed has has a low pour point but is typically thicker at operating temperature...
Originally Posted By: saturnsc2
is there a thickness difference bwtween synthetic & conventional oils of the same weight, for example 5w30 synthetic vs 5w30 conventional?
That depends more on the formulations. I believe most synthetics, such as Synpower or PP, tend to be pretty much the same at temp. as conventionals. I was doing a lot of summer highway driving with my ol' SL2, so I wanted a thicker oil at temp. I also had good luck with Valvoline MaxLife 10w30/40 for reducing consumption to about one quart every 3500-4000 from a quart every 2000-2500 with conventional...
