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Arco Gas That Bad?
Posted to Technical Theory Forum on 3/5/2021 20 Replies

Ok guys, I'm planning on running a tune on my truck for 91 octane. I've been warned by others to not run 91 octane by Arco because it's poor quality. I have seen what poor gas can do to gdi engines but my truck is 03 sierra with an lq4 so nothing crazy. Its no... Login to read more.

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