I have a rebuilt L69 engine in excellent condition and use Moble 1 Tri-synthetic 5W30 .. Now, this stuff is pretty darn expensive .. How important is it to use the best when it comes to motor oil? Is it worth the price??

And what does everyone else here use??

 

well, its only $30 about every three months, to me, its well worth it, I use Mobil 1 10w-30 synthetic.

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88' GTA 350 MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass

 

Mobil 1 5W-30, except for summer with Mobil 1 15W-50. Easy to find, and I could go on and on about its various properties that make it superior to most other oils. Just extend your drain intervals to four months if three is too expensive.

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1990 IROC 350
Mods: Too busy trying to make it run right to mod it.
Airfoil, Dynomax cat-back, Accel coil, 180 t-stat, Bald Eagle tires,
Hypertech fan switch, Accel 23# injectors, Holley AFPR, ported plenum,
Ruger P95DC, hot wife, new oil filter, thick rubber floormats, no cats.
18.0 @ 85MPH since I'm one big-a$$ MF
"It's better to have and not need than to need and not have."