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International Automotive Technicians Network
Oil discussion
Posted to Technical Discussion Forum on 2/20/2021 65 Replies

I have a friend that uses 15w40 and 10w40 in everything he owns. His view is the thicker the oil the better protection it provides. These newer cars that require 5w30 or 0w20 he would use 1030 in everything. When using the thicker oil he claims he looses 4-5 m... Login to read more.

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