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no dice on the hills / wind at 65-70. you're still cruising in an oversized shoe box. basically, on my 4 cyl motor it was very noticable, HOWEVER!.....it makes this aweful noise now. sounds like a diesel motor at 2krpm. it's been doing it since day one of RP treatment. I even pulled the head to look for loose valves/bent rods. everything was dead nuts. so, i live with the sound (it's pretty quiet most of the time). just a warning. i've heard of some people who have experienced the same thing. some valve type clatter, but no oil blow-by or other bad things. even with the noise, i get awesome mileage (went from 180 tank to just over 220).
 8 months and counting...she'll be mine soon beer |