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Message: [QUOTE="jimdawg185, post: 1463484, member: 757"] The other way around, in heui engines. The 5-40 cold starts better, but you give up ICP hot. 8800 15-40 is a good happy medium as its cold start characteristics are better than most 15-40s but hold ICP petter than any 5-40. All 5-40s are a little lower viscosity at operating temp than 15-40. It's just the nature of how they get those oils to do that spread. And all 15-40s are higher vis at lower temps. Basically this is just important in heui, in non heui the difference is really only important in very cold temps like below-20 and in very high power applications. Sent from my iPhone using Tapatalk [/QUOTE]

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