View Single Post
Old 07-17-2019, 01:16 PM   #11 (permalink)
hayden55
Master EcoModder
 
Join Date: Dec 2010
Location: arkansas
Posts: 658

"Proper Shitbox" (SOLD) - '96 Honda Civic LX fully optioned no weight reduction
90 day: 41.9 mpg (US)

Plue Brius - '10 Toyota Prius II
90 day: 57.73 mpg (US)

The Smoke Bomb - '96 Ford Ranger
Thanks: 190
Thanked 121 Times in 96 Posts
Not a ton. From class we had a little tribology portion in mechanical system design and the big weights weren't hugely different. I'm sure you could find a "temp and viscosity thickness" chart and compare different weights at x temp for your reference as it relates to your transmission. Main take away: gas mileage will only vary a small percent wise, but the friction goes up and decreases the life cycle rating if the bearing/wear tolerances are designed to maintain a certain gap /psi rating with the spec weight at x temperature and you put in a thicc er fluid or cool the fluid too much. Think: Toyota doesn't recommend 0w-20 in their 0w-16 designed motors.

__________________
"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."

2010 Prius
1996 Ranger
1987 Bass Tracker 70hp Yamaha
1970s 15' Water Rover 30hp Yamaha
2009 Suzuki GS500F
  Reply With Quote
The Following User Says Thank You to hayden55 For This Useful Post:
EcoCivic (07-17-2019)