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Old 04-27-2009, 08:34 PM   #19 (permalink)
Master EcoModder
Join Date: Apr 2008
Location: Michigan
Posts: 261

Bio Deezler (sold) - '03 Volkswagen Jetta GLS TDI
90 day: 50.78 mpg (US)

The Beast. - '03 GMC Sierra 2500HD SLT
90 day: 12.86 mpg (US)
Thanks: 0
Thanked 36 Times in 22 Posts
Actually Christ, thats a good question. I have no idea if OE caps would fit. I don't have any on hand (don't want to pull them out of my winter wheels and sold my old OE 17s). These center cap stickers are aluminum backed and only cost 7 bucks on ebay. They seem like a really nice product, and fit right over my new wheel center caps.

As far as mileage is concerned with the new wheels/tires and air intake, I'm not really seeing any benefit - yet. My last tank was compromised with troubleshooting and hard acceleration testing. Plus a different pump and fill-up procedure today. doh. Nothing lost though, at 47.x mpg.

I keep screwing with my engines calibration (this time with MAF sensor swap) and thus affecting fueling and turbo boost maps. Makes it hard to find minute differences. Hopefully when I get everything fully sorted I'll nail down a 50+ tank.
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