I don't drive much, nor have I compared with/without the device. On a bone stock 94 Integra with 200k on the clock, it looks to be averaging 33 mpg city. That is over a 3 week period per tank and about 4 cold starts a day. I really need to tune the pig or at least get a narrow band afr monitor so I'll know how much I can load it.
I may have been loading it too heavy this last tank. The larger air cylinder just came in, it's going to get an upgrade this week
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