09-12-2006, 06:12 AM
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#5 |
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1000whp postwhore
Join Date: Jun 2005
Location: Mojave Desert, Calif.
Posts: 1,705
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Our cars are old, and even when new, they were designed to run 10w-40 most of the time.
Many newer cars are running 5w-30 and synthetic 5w-30 because of the tighter clearances (bearings / pistons) due to increased (tighter / lower #s allowed) emission standards. Perhaps 1 more MPG. Also the tighter clearances require a thinner oil to help get it everywhere in the engine quicker.
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Had a Red 1989 N/A. Automatic. Sports Pkg. w/wing. TEMS, and some nice MODS. Sold to a friend 10/08/08. |
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