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Old 04-18-2019, 02:23 PM   #21 (permalink)
Master EcoModder
Join Date: Dec 2010
Location: Arkansas
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Toyota Prius SUV - '10 Toyota Prius II
90 day: 59.63 mpg (US)

V6 Ford Ranger Pickup - '96 Ford Ranger
90 day: 25.97 mpg (US)
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Originally Posted by California98Civic View Post
I have very high quality (and expensive) ceramic and metallic heat rejecting tint on my car. I can feel very significant and Marge difference if I roll the window down versus rolling it up from the Sun on my skin. That's not science of course, but it confirms some of what testers have shown.
a while ago on the Prius I found the numbers for the oem windshield heat rejection tint and added the numbers of my 3m Crystalline to it.
Windshield: OEM + 70% 3m Crystalline = 56% VLT, 79% TSER.
Drivers Window: OEM + 40% 3m Crystalline = 25% VLT, 78% TSER.
Big difference in HVAC needed, you can feel the difference on a sunny day if you roll down the rear window in the sun and pass your hand back and forth. I can usually roll around town with very minimal HVAC use most of the time none up to about 30 minutes.
Running around town on short 10-15 minute trips with the AC set on 71 Auto with the vents screaming vs not using the hvac is the difference between 39 mpg and 55+ mpg for those short trips.

"I feel like the bad decisions come into play when you trade too much of your time for money paying for things you can't really afford."
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