I thought I remembered this being discussed before, but I couldn't find anything in the archives. Do you have a recommendation for oil for the LT-5 engine? Old enough to call for Cl-4?
ZR-1 (LT-5) oil - Duke?
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Re: ZR-1 (LT-5) oil - Duke?
The first place to start is the OE recommendation. If they just recommended a conventional spark ignition oil (SF or SG was probably the current SI engine spec when it was built) and if oil consumption is low, then a conventional mineral oil based CI-4 would be fine.
If they recommend a synthetic, then a current SL or SM synthetic would be okay or a synthetic CI-4.
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