It doesn't matter
It was nice for a while, we went a couple whole weeks without a chris86 argument thread. Oh well.
Most German cars spec 91 and have very few low-speed pre-ignition (LSPI) issues, especially compared to the domestics or Koreans. Tuning probably has something to do with it but also fuel octane requirement likely does as well.
If I drive 31,200 miles per year here are my costs:
$2,786 per year @ 28MPG w/93 octane
$2,460 per year @ 26MPG w/87 octane
Now for the savings, and this is huge -
I'd save $326 per year if I used 87 octane instead of 93.
Gotta pinch those pennies where you can!
My commute is 100 miles per day, five days a week.
If I go for a drive on the weekends that's usually at minimum another 100 miles.
Also, the commute every day does not include driving around town running errands, etc. I'd say it's probably closer to 115-120 miles a day from M-F.
Driving While Awesome Podcast. Give it a listen. #TeamAkane. Donate to help a wonderful family kick cancers ass
Originally Posted by Phillie Phanatic
No, but it depends on the weather, the car and the decade. When premium was $0.05-.20 more per gallon, I always ran it (69 Chevelle, 91 SHO). Next was my 00 1.8T Passat. I tried 87, but got nearly 10% less mpg. Once chipped, only 91 or 93.
With my 01 Passat V6, it ran fine on 87 until it was hot out and it cut power slightly. It was fine on long distance highway drives, but with temps 100+, it was slower off the line. So locally in the summer (8months), it got premium and on a 4-5K trip, it got regular. Since the 1.8T swap (not chipped), I did the same as the $.50 price difference was more than the mpg gain. Apart from the trips, I usually drove 5K and year. Trips added 3-5K/yr when we took them. Now I rarely drive my wagon, maybe 10 miles a week, so it does not matter. The Tiguan takes 87 without issue.
2019 Tiguan SE 4Mo Orange, temporarily stock. 2001 Passat 4Mo wagon, 1.8T/6sp swapped, Konis, coilover sleeves, A6Q H+R Race springs.
2005 Golf GLS, 2.Slow, Auto, GTI suspension, sways.
2001.5 Passat GLX V6, stock. (son#1), 2000 Passat GLS V6 fwd Tip wagon, stock (son#2)