I have owned two Isuzu trooper's.
and 88 and a 98.
Both having higher mileage I have always used 10W-30.
If your truck is burning oil it may help to get a higher viscosity of oil, but 10W-30 will get the job done.
0-20 mobil oil fully synthetic dont put to much ...
5w-30 is the best to use on the trooper, i take it, it is the 3.0DT? Its a very fickle engine and doesnt like any other type
5W-30, preferably synthetic.
5w30 fully synthetic
Would have been built for R12, can be converted to R134a.
Remove the drain bolt from the oil pan, and let the oil drain into a bucket. Unscrew the oil filter with the use of a filter wrench. Screw the new filter on, and reinstall the oil bolt.
I have been using REGULAR in my 2000 3.5 Trooper and never had a problem.
I have a 95 Isuzu trooper 3.2 dohc. --On line you can bring up the chiltons manual through the library (for free) here in Washington. -You just need a library card. When I was looking at the recall and revision page in the chilton manual it had an entry of a revision for the oil type to help remove the ticking in the engine that is caused by a varnish build up of the oil and it suggest to use 0w30 to get rid of it. I don't know what the normal is though it is probably 5w30. Hope I was able to help.
An NPR diesel uses a 15w-40 weight oil in most applications. Gas engines use 10w-30.
Why would you want to go back to a non-synthetic oil. Synthetic oil's are far superior to non-synthetic oil.Hope This Helps.AnswerNo, todays oils are compatible and it won't hunt anything changing back and forth
I use 15w-40 amsoil in my trucks with no problems and it takes about 3 gallons.
Any internal combustion engine will use oil.