FMI-How many hours or miles on Mobil 1 Syn.

huskerhayman said:

I have seen an oil related failure once. It was a dodge stratus with a 2.7 L and about 35k miles on it. They never changed the oil on it since new and when we took off the valve covers it was not pretty looking. Black, burn, gummy oil everywhere. This was dino oil.

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That is not a oil related failure, that is a dumb azz operator. My uncle did the same thing with a 4.0L Jeep. 35,000 miles give or take on that one also. A oil related failure in my eyes is the oil falling apart or failing in some fashion well before normal change intervals or even at it. 35,000 miles is 10 times the normal change rate on dyno oil.

Chris

I have used JD 0wx40 and Shell 5wx50 oil with extended miles. The JD has gotten has high as 13K-14K before the lab recommended an oil change. The Shell might have gotten up to 10Kish before I changed it but it was just fine.

How many miles your oil can go depends on your use. One oil change on the truck I had fuel in the oil. The amount was still within spec but obviously you don't want it there in the first place. Fuel had never been in the oil before or since. Why was it present? At the time my route went into a town that had what I called the Valley of Death. The valley had two lane roads and huge amounts of traffic passed through the town during rush hour. The roads were being worked on so which made the traffic that much worse and I routinely would be stuck in stop and go traffic for 15 minutes during a 60 minute commute. I figure that 15 minutes would not matter much since it was such a small part of my drive. Maybe it was or maybe it was not. Certainly there were a few times in the Valley of Death where I was in traffic for 30 minutes or more. That stop and go traffic with low idle speeds gave me the fuel in the oil. My route changed after that oil change and I have not had the problem since.

Oddly enough my tractor had fuel in the oil at the same time. I don't run the mower and thus PTO speed but a few times a year. The tractor would run at 1600-1700ish RPM which apparently was not enough to keep fuel out of the oil. Again it was within spec but I increased RPM to 1800-1900ish and no more problems.

I have never used up the TBN in the oil. Strangely some UOA have the TBN still at 10-12 after very long miles on the oil. Most of my driving now is rural 55 mph roads with very few stops. I think that helps the life of the oil. YMMV.

Later,
Dan

I have used JD 0wx40 and Shell 5wx50 oil with extended miles. The JD has gotten has high as 13K-14K before the lab recommended an oil change. The Shell might have gotten up to 10Kish before I changed it but it was just fine.

How many miles your oil can go depends on your use. One oil change on the truck I had fuel in the oil. The amount was still within spec but obviously you don't want it there in the first place. Fuel had never been in the oil before or since. Why was it present? At the time my route went into a town that had what I called the Valley of Death. The valley had two lane roads and huge amounts of traffic passed through the town during rush hour. The roads were being worked on so which made the traffic that much worse and I routinely would be stuck in stop and go traffic for 15 minutes during a 60 minute commute. I figure that 15 minutes would not matter much since it was such a small part of my drive. Maybe it was or maybe it was not. Certainly there were a few times in the Valley of Death where I was in traffic for 30 minutes or more. That stop and go traffic with low idle speeds gave me the fuel in the oil. My route changed after that oil change and I have not had the problem since.

Oddly enough my tractor had fuel in the oil at the same time. I don't run the mower and thus PTO speed but a few times a year. The tractor would run at 1600-1700ish RPM which apparently was not enough to keep fuel out of the oil. Again it was within spec but I increased RPM to 1800-1900ish and no more problems.

I have never used up the TBN in the oil. Strangely some UOA have the TBN still at 10-12 after very long miles on the oil. Most of my driving now is rural 55 mph roads with very few stops. I think that helps the life of the oil. YMMV.

Later,
Dan