FWIW ...

In my wifes old Lumina, which I finally traded with 260,000 miles, I used Mobil 1.

She put 30K a year on the car.

I changed the filter every month and added a quart of oil. I changed the oil once a year.

Keep the oil clean ... that is the key ...

 

I've run Valvoline 5w-30 since the first oil change @ 3000 miles. Same every 3k since. I lose little to no oil on my '01 LS1 A4 and it's clean, clean, clean in there. Motor's running smooth and strong @ 32,000 miles.

I also have a '59 project truck that has a rebuilt and built-up motor in it. I complement oil changes with Lucas oil additive. Good for the valve seals and REALLY helps the motor purr smoothly. So maybe instead of running 100% synthetic oil in your 60k Camaro, you should look into running a good brand name petroleum-based motor oil + Lucas (or similar)???

You seem pre-sold on using 100% synthetics, but that may not be the best way to go as noted by previous reply's to your thread. Hope this helps you decide which route is best for you

Have fun, be safe!
Daryl

 

i've used 5w-30 synth, 5w-30 dino, and am currently using 5w-40 synth. oil consumption, while not bad, has remained a fairly constant 1 qt. every 1.5-2k miles. i think the "5w" is the culprit.

a fellow i know that open-road races a mallett 'vette swears that using half 5w-30 and half 15w-50 m1 will dramatically reduce oil consumption in the ls1. however, according to him, the resulting thicker oil will loose about 5-7hp over a 5w-30 or 10w-30 energy conserving oil.