Sorry if this has been covered before, but I tried using the search, and it didn't come up with any tangeble results - lets face it, the search is quite horrendous.
I've read that my Direct Injection engine (GM 3.6L) is quite hard on oil. I run PP (also have some QSUD in my stash, and just picked up some Castrol Edge) 5w-30 which is what the manual specifies. I live up in Canada, which can go down to -30 Celcius in winter, and up to +35 on some days in the summer.
My wife drives the Buick Enclave, and does very short commutes daily, with lots of stop and go, if she does jump on the highway, its likely for less than 5 minutes as we live and work in the 'burbs. I've got 115K km on the vehicle at the moment, and have been following the OLM so far, but my records show that I've only been running approx 4000 KM per oil change - which seems very minor, and makes me feel like I'm dumping perfectly good PP oil.
What would you guys suggest? Keep following the OLM, or start going by mileage. If I go by mileage, I might be down to 1-2 oil changes per year. I do have concerns about doing extended OCI's due to the engine being so hard on oil, but I don't know exactly what this engine is capable of. If I'm wasting perfectly good oil, then thats no good either (for my wallet or the earth!)
I've read that my Direct Injection engine (GM 3.6L) is quite hard on oil. I run PP (also have some QSUD in my stash, and just picked up some Castrol Edge) 5w-30 which is what the manual specifies. I live up in Canada, which can go down to -30 Celcius in winter, and up to +35 on some days in the summer.
My wife drives the Buick Enclave, and does very short commutes daily, with lots of stop and go, if she does jump on the highway, its likely for less than 5 minutes as we live and work in the 'burbs. I've got 115K km on the vehicle at the moment, and have been following the OLM so far, but my records show that I've only been running approx 4000 KM per oil change - which seems very minor, and makes me feel like I'm dumping perfectly good PP oil.
What would you guys suggest? Keep following the OLM, or start going by mileage. If I go by mileage, I might be down to 1-2 oil changes per year. I do have concerns about doing extended OCI's due to the engine being so hard on oil, but I don't know exactly what this engine is capable of. If I'm wasting perfectly good oil, then thats no good either (for my wallet or the earth!)