Quote:
Originally Posted by ps2cho
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Change the oil immediately, overheating causes additive packages to become extinct. Use 15-40 diesel oil such as Rotella-T 15-40, Delvac 15-40, Delo 15-40, I'm partial to Rotella-T and Delvac. The 86 103, unless changed under warranty, will probably still have the pre-hardened cam and it is susceptible to scoring and wear. The zinc additive is a must that is within the above oils!
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Why diesel oil? I thought the zinc additives were bad for cars with cats ( assuming his 86 has one).