Fuel recommendation for 2014 Forester

Asked by Guru8G3LG Jan 12, 2020 at 09:27 AM about the 2014 Subaru Forester

Question type: Maintenance & Repair

6 Answers

I had the ECU update for high altitude pinging which helped a bit but not enough. I asked my dealer if there are any more update and they said no. High altitudes are murder and we need premium when crossing the Sierra's. Octane booster also helps but for ordinary driving 89 octane is good enough. It pings regardless of the fuel source.

47,950

An old trick I learned when piloting G37xs was that because of the non-linearity of octane distillations and price strata, if you combine equal amounts of 93 and 87 octane you get a 91 octane for the same price as 89 mid-price at the pump. Easy way to achieve this is just to alternate fill-ups of 93 and 87 when around the 3/8-1/2 tank level. Works well, and maybe you'll be ok with this "ersatz" cheap 91. It may be a PITA to try to remember which to put in if you forget the preceding fill-up unless you create a little mnemonic device like the common day of the wee you gas up, or maybe a visual marker in the car that you flip...or maybe use the A and B trip odos alternately? Have fun. Ern

I have done that before. Not too many people know how fuel octane averages.

47,950

Not sure I'd do it on some high-pressure turbos nor my Cosworth boosted Miata, where dicking around with "fake" 91 isn't as safe as just ponying up for 93 and no worries. Keep warm. Ern

Your Answer:

Forester

Looking for a Used Forester in your area?

CarGurus has 1,375 nationwide Forester listings starting at $3,495.

Postal Code:

CarGurus Experts

  • #1
    Chris W
    Reputation
    11,360
  • #2
    TheSubaruGuruBoston
    Reputation
    9,750
  • #3
    Nick Eidemiller
    Reputation
    6,210
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Subaru Outback
55 Great Deals out of 1,103 listings starting at $3,495
Used Toyota RAV4
111 Great Deals out of 2,857 listings starting at $2,949
Used Subaru Crosstrek
46 Great Deals out of 1,369 listings starting at $5,995
Used Honda CR-V
157 Great Deals out of 4,953 listings starting at $440
Used Toyota 4Runner
20 Great Deals out of 517 listings starting at $6,825
Used Subaru Impreza
30 Great Deals out of 654 listings starting at $5,995
Used Subaru Legacy
15 Great Deals out of 210 listings starting at $3,495
Used Toyota Highlander
37 Great Deals out of 814 listings starting at $8,495
Used Mazda CX-5
70 Great Deals out of 3,265 listings starting at $6,990
Used Toyota Camry
44 Great Deals out of 1,140 listings starting at $3,900
Used Toyota Tacoma
43 Great Deals out of 684 listings starting at $9,975
Used Honda Pilot
33 Great Deals out of 792 listings starting at $2,495
Used Nissan Rogue
127 Great Deals out of 4,950 listings starting at $3,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.