Hey guys I have an 03 GX470 that has... 363k miles on it. Yes its not a typo lol! I bought the car from a customer at my dealership where I work at 290K miles and it has run great for me for 5 years. I am the second owner and also the tech that has done 80% of the services on this car since it was brand new. It has never seen a drop of synthetic oil just the standard 5W30 that the dealership sells and has always had 5k mile oil changes.
The motor has started having a slight knock which is understandable at this mileage but it goes away after a minute or two once the motor has some heat in it. It has also started smoking some on cold starts due to oil leaking by the valve stem seals, again once warmed up no smoking what so ever.
I would like to start using a high mileage oil (better late than never lol) and want to use the best non synthetic off the shelf oil that will help control the oil leaking past the valve stem seals.
Suggestion?
The motor has started having a slight knock which is understandable at this mileage but it goes away after a minute or two once the motor has some heat in it. It has also started smoking some on cold starts due to oil leaking by the valve stem seals, again once warmed up no smoking what so ever.
I would like to start using a high mileage oil (better late than never lol) and want to use the best non synthetic off the shelf oil that will help control the oil leaking past the valve stem seals.
Suggestion?