Valvoline oil is JUNK. I work for a place that changes oil and we do about 100 cars a day. Cars that come in that had been using Valvoline, I always notice that the filters are all gummed up and the oil gets real thick and takes longer to draing verse others. Our main oil is Mobil and from what I have seen it is one of the best oils out there. I personally don't use it, I use Kendall 20-50 and think that it's a pretty good oil too. Also amongs all the other oils, I usually see that Pennzoil is'nt that bad. Castrol GTX is almost like a Valvoline but it gets really dirty fast. I don't see alot of people using Quaker State anymore so it's hard to compare it. This is just my opinion based on what I see everyday.
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87 GT, Cobra R's,GT-40 heads,Crane 2031,1.7's, Edelbrock intake, long tubes,BBK cold air, Mass air,pulleys,Pro 5.0, King Cobra,Lakewood Lift Bars,50/50's,subframes, 4.10's.
Best time 12.759
Best MPH 106.79
Best 60' 1.695
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[This message has been edited by 93CobraR (edited 09-10-2001).]