I have a work van that is pretty old and beat up. It's a 2001 GMC Savana 1/2 ton, and I have no idea how many miles are on it. When I got it the odometer read a little over 120,000, but then it stopped working. I don't know if the gauge cluster had been replaced before, but I replaced it with one where the odometer worked. I've driven it more than 50,000 miles since then.
Since I've had it, it's used about a quart in 1500 miles. Sometimes it takes 2000 miles to burn the first quart, I don't know why. I've used various 5w- and 10w-30 oils, including high mileage ones without much change. It doesn't leak oil.
For my end-of-summer OC, I put Quaker State 20w-50 in it. I figured that being thicker and having a super-low NOACK number, maybe consumption would be less. Nope. Mileage dropped a little, but not a lot. Oil pressure was about 5 psi higher when warm, 60 vs. 55 on the factory gauge at highway speeds. So when it was a quart low, I added a quart of Mobil 1 0w-30 I had laying around to thin it out a little. For the next quart, I added 5w30 Pennzoil. I didn't see any point in continuing to use 20w-50.
Now winter is here, and it will soon be dropping into the 40's and 50's at night, so this time, I used Mobil 1 10w-30 HM.
Since I've had it, it's used about a quart in 1500 miles. Sometimes it takes 2000 miles to burn the first quart, I don't know why. I've used various 5w- and 10w-30 oils, including high mileage ones without much change. It doesn't leak oil.
For my end-of-summer OC, I put Quaker State 20w-50 in it. I figured that being thicker and having a super-low NOACK number, maybe consumption would be less. Nope. Mileage dropped a little, but not a lot. Oil pressure was about 5 psi higher when warm, 60 vs. 55 on the factory gauge at highway speeds. So when it was a quart low, I added a quart of Mobil 1 0w-30 I had laying around to thin it out a little. For the next quart, I added 5w30 Pennzoil. I didn't see any point in continuing to use 20w-50.
Now winter is here, and it will soon be dropping into the 40's and 50's at night, so this time, I used Mobil 1 10w-30 HM.
