Amsoil has several choices for CI-4 and not a CJ-4 backwards compatable.. the AMO 10W40 is now what they call the clasisc car formula. Has 1440 ppm zddp. For less cost the 15W40 Diesel Marine.
I suggest their new flush which is a mild detergent based flush, then the 100% synthetic oil will continue to protect from sludge and deposits should there be flow issues thanks to the high film strength and you will be impressed with the smoothness of the engine and expect a 5 to 10 degree oil temp drop.
I suggest their new flush which is a mild detergent based flush, then the 100% synthetic oil will continue to protect from sludge and deposits should there be flow issues thanks to the high film strength and you will be impressed with the smoothness of the engine and expect a 5 to 10 degree oil temp drop.
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