- Jul 29, 2006
- New Mexico
I just purchased a used 2005 GTO about a month ago. Car currently has 6,3xx miles on the odo. The prior owner used to use M1 0w40. The GTO isn't a daily driver... I might drive it once or twice a week, maybe 1-2k miles a year if that. At any rate, my oil changing schedule would call for changing the oil at 5,000 miles/6 months, which ever comes first. Considering my driving habits for this car, the oil will be changed every 6 months. So now it's time for an oil change, and I was wondering which oil would be more suitable for an LS2 in a desert climate... ... GC 0w30 or M1 0w40 .... ... or does it even matter, taking into consideration how infrequently I drive the GTO? I know LS1's like thicker oils, however I wasn't 100% sure if the rules would still apply to a Gen IV LS2 or not, or if an LS2 likes a different oil better. BTW, the reason I chose these two oils is because both are highly recommended in LSx engines, and both are readily available for local purchase where I live.