20w50 on a DD 402 after break-in? Or stick with 10w30?
05-13-2009, 11:22 PM
#21
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It's a Full Weight car minus the spare tire and jack. 123.4 mph was my best of the day and it was done at a track known to be a little slower than most. I'm gonna put in some 4.10's and take a little weight out to see if I cant get a 10.99 at a better track. Someone I knew ran a 11.2x there and a 10.99 at Bakersfield raceway picking up 2+ mph.
05-15-2009, 07:19 PM
#22
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i was running 20w50 valvoline vr racing oil for break in periods then after 4500 miles swithced to mobil one 15w50 syn. then i recently switched back to valvoline 5w-30.. Great oil pressure at start up and at idle!
05-16-2009, 06:54 AM
#23
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It's strange because after just ~50 miles driving with the 20W50 my hot idle is at ~40-45 now. I'm not at 4500 miles yet but I wasn't planning on going synthetic . . .
