The 2013 Subie owners book says use 87 octane fuel in both the 4 and 6. Why is there a question about this?

Asked by TechTwo May 14, 2016 at 05:51 PM about the 2013 Subaru Legacy 3.6R AWD

Question type: General

2 Answers
41,875

Auto_Centric answered 7 years ago

Are you asking what to use? There is no question 87 is fine for those 4 cylinder and 6 cylinder Natural aspirated engines, they do have high static compression ratios, so high octane fuel is of NO benefit. Now an STI turbo does benefit from higher octane as the turbo really just boosts the cylinder filling and DOES increase the dynamic compression ratio. If your into power read about thermodynamics and increased compression ratios. Kinda easy to understand just a time investment to learn.

Best Answer Mark helpful

Your Answer:

Related Questions

Shortcuts

Search Subaru Legacy Questions

CarGurus Experts

  • #1
    TheSubaruGuruBoston
    Reputation
    2,780
  • #2
    Anthony_60
    Reputation
    1,800
  • #3
    Tom Hawkins
    Reputation
    1,500
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Subaru Outback
44 Great Deals out of 1,124 listings starting at $2,995
Used Subaru Impreza
24 Great Deals out of 642 listings starting at $3,995
Used Toyota Camry
48 Great Deals out of 1,085 listings starting at $2,500
Used Honda Accord
47 Great Deals out of 974 listings starting at $2,995
Used Subaru Forester
31 Great Deals out of 1,285 listings starting at $3,995
Used Honda Civic
186 Great Deals out of 4,031 listings starting at $2,530
Used Subaru Crosstrek
47 Great Deals out of 1,220 listings starting at $5,995
Used Toyota Corolla
147 Great Deals out of 2,249 listings starting at $3,495
Used Subaru Impreza WRX
5 Great Deals out of 21 listings starting at $7,995
Used Nissan Altima
32 Great Deals out of 662 listings starting at $1,995
Used Toyota RAV4
140 Great Deals out of 2,981 listings starting at $4,999
Used Honda CR-V
189 Great Deals out of 4,991 listings starting at $440

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.