Re: 5w-20 Or 10w-30 ?
I agree, the CAFE specs stuff throws another variable into the equation. I talked to a mechanic and he said to stay with the 5W-20. but like I said I live in San Antonio Texas and we do hit near 100 degrees in the summer, so I used 10w-40 in the two previous cars (97 and 98 model - which both got totaled out, the first a straight head on me going 82 and the other driver 76 and the second a front side on by a 4x4 that floored it thru a red light and hit me and I'm still here so I bought this 3rd car the 2006, but this time I had to go used). So if its 100 degress and figure that engine is a lot hotter and with stop and go and even on highway running a/c I figure that engine could use the 40w down south. The mechainic and other on this site stated that the tolerances are probably tighter for this newer engine and 5W-20 would be recommend. I will go with the 5W-20, but on the next I am going to full snythetic, right now it has blend.
thanks for your info.