Does oil viscosity affect fuel consumption? My feeling is that viscosity is important for starting the motor, but once at running temperature it's not that important.
- posted
19 years ago
(newbie question) oil viscosity and fuel consumption
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- posted
19 years ago
I just got back from Jetta 5 school and the manial says rhis. One reason VW now uses the new electrol-mechanical power steering is because it saves 1/2 gal of fuel n 600 miles. Thicker oil takes more HP to pump than thin oil. So... over time thin oil does save fuel.
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- posted
19 years ago
What oil do you guys use in your A3 Jetta ? not the brand but viscosity?
10/30 ? or what? would be interesting to know. I put 30WT Redline in mine this time. maybe thicker would be a little more quite.-Lee
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19 years ago
I use 10w30 in the winter and 15w50 in the summer. Mobil 1 synthetic.
1994 A3 4cyl with 198000~ miles.- Vote on answer
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19 years ago
I have 1986 Jetta, and I usually use 10w30 in winter and 20w50 in summer. But, this year, I got lazy and forgot to change the oil. I noticed that I was getting noticably low milage than other winters (at least from what I remember). Hence, this thread...