Originally Posted by chops

you guys should read the g37 forums. theres a HUGE thread on oil analysis done there with hundreds of different results. i believe mobil1's fully synth doesnt fare too well with our engines....hence why i strayed away this time. im using pennzoil ultra fully synth since i saw nothing but good things on the oil analysis done on this particular oil. $27 for a 5 quart jug at walmart too!