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Slow front O2 sensor - long post 850

If the front O2 sensor gets old and dirty, it will cost you 2-5 mpg and sometimes more.

I ran my cars with 89 octane, it comes with the same cleaners that 91 octane has. I also found that full boost (HPT) was limited to 5000 rpm with the 89 octane, 91 octane let me go to redline.

Klaus
--
My advice is free, so you got what you paid for...






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