Don't put anything in your oil -- a good oil should have plenty of detergents to keep things clean.

If you go with Dino, Chevron DELO 400 15W-40 or Shell Rotella-T are great. Just change them at 3-5K intervals.

If you go partial synth, go with. Mobil 1 and change it at 5K. Few Mobil 1 are "full synthetic" despite what their marketing says.

If you go full "Mack Daddy" synthetic go with Red Line. It's expensive but the very best. Motul is also an excellent choice. You can go extended drain with these & change them at 10K.

Cheers,
Gerry


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