Disclaimer: I am not asking for your opinion on the use of an Ampco oiler in a modern vehicle, and any such posts will be ignored.
I've been using an Ampco (Marvel Mystery Oil) Oiler for it's claimed benefits: "provides critical valve to seat lubrication, which is now absent from gasoline, and prevents sticking valves and detonation caused by carbon and combustion deposits". When doing the head gasket as preventive maintenance on my '97 Landcruiser with only 135k mi (the old design is known to be a problem spot) the machine shop found I needed all new exhaust valves and valve guides. They said it looked like I had extra air getting in from somewhere and like it was running lean. Never a CEL, oil usage/burning, or a noticeable problem, and all maintenance done on time. I am wondering if it is possible the Ampco oiler might be to blame? I know there were a few times I let the Ampco run dry before filling it up again. I am wondering if this is a possible culprit for running lean, and if this may have still occurred even if I hadn't let it run dry those few times. Any helpful comments would be greatly appreciated.
I've been using an Ampco (Marvel Mystery Oil) Oiler for it's claimed benefits: "provides critical valve to seat lubrication, which is now absent from gasoline, and prevents sticking valves and detonation caused by carbon and combustion deposits". When doing the head gasket as preventive maintenance on my '97 Landcruiser with only 135k mi (the old design is known to be a problem spot) the machine shop found I needed all new exhaust valves and valve guides. They said it looked like I had extra air getting in from somewhere and like it was running lean. Never a CEL, oil usage/burning, or a noticeable problem, and all maintenance done on time. I am wondering if it is possible the Ampco oiler might be to blame? I know there were a few times I let the Ampco run dry before filling it up again. I am wondering if this is a possible culprit for running lean, and if this may have still occurred even if I hadn't let it run dry those few times. Any helpful comments would be greatly appreciated.