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Deezler · 01-29-2010, 01:45 PM

Thanks guys.

Aloha, the VG's are doin just fine, I suppose. When I installed them my daily scan gauge readings seemed to jump up just a bit, but I never proved it with actual fuel economy improvement. If you recall my VG installation/testing thread, tuft testing showed that they definitely affected / improved the airflow down the lower rear glass and trunk lid. But I suspect that the drag they induce locally at their mounting point basically offsets any improvement in rear wake reduction.

Owning a TDI is definitely a hands-on experience. If you can't do the basic maintenance yourself (and correctly) they can be expensive to own. But the internet abounds with helpful tips and DIYs. My TDI has never had a serious engine / vehicle problem though (knocking on desk now). All the problems I've ever had with my TDI have been from vehicle systems that I've modified myself (use of biodiesel leading to fuel gelling / clogs, install a coolant heater and get a coolant leak, etc.). Otherwise the only money I've had to put into owning it over the last 60k miles is one brake replacement (free labor (me) and $250 for parts), standard timing belt / water pump job before 100k miles ($350 parts and 350 labor), and oil and filter changes every 7 or 8k miles. In the meantime I am saving hundreds on fuel costs with an avg 48 mpg in 2009. Plus with my engine upgrades I now blow the doors off almost any Honda or Toyota in acceleration...

I love this vehicle and would highly recommend it to anyone with even just basic wrenching ability.

01-29-2010, 01:45 PM	#49 (permalink)
Deezler 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	Thanks guys. Aloha, the VG's are doin just fine, I suppose. When I installed them my daily scan gauge readings seemed to jump up just a bit, but I never proved it with actual fuel economy improvement. If you recall my VG installation/testing thread, tuft testing showed that they definitely affected / improved the airflow down the lower rear glass and trunk lid. But I suspect that the drag they induce locally at their mounting point basically offsets any improvement in rear wake reduction. Owning a TDI is definitely a hands-on experience. If you can't do the basic maintenance yourself (and correctly) they can be expensive to own. But the internet abounds with helpful tips and DIYs. My TDI has never had a serious engine / vehicle problem though (knocking on desk now). All the problems I've ever had with my TDI have been from vehicle systems that I've modified myself (use of biodiesel leading to fuel gelling / clogs, install a coolant heater and get a coolant leak, etc.). Otherwise the only money I've had to put into owning it over the last 60k miles is one brake replacement (free labor (me) and $250 for parts), standard timing belt / water pump job before 100k miles ($350 parts and 350 labor), and oil and filter changes every 7 or 8k miles. In the meantime I am saving hundreds on fuel costs with an avg 48 mpg in 2009. Plus with my engine upgrades I now blow the doors off almost any Honda or Toyota in acceleration... I love this vehicle and would highly recommend it to anyone with even just basic wrenching ability.