H6 fuel requirements


Asked by Undie Feb 03, 2008 at 08:37 PM about the 2002 Subaru Outback H6-3.0

Question type: General

Do these earlier H6 engines require premium fuel?  My dad needs a 6 cyl to tow his boat but would not want to spend the extra $$ for premium fuel.  

8 Answers

Not Active

no,regular is fine.

1 out of 2 people think this is helpful.

I'm not able to find any specific information about the Subaru H6 engine fuel requirements on the internet. I'm sure regular unleaded is fine!


I have three Subaru's, two are the H6 3.0L. They require premium, they will run on regular but they perform and run cleaner with prem. Run the mileage...it is about the same payout, you lose mpg with regular and gain 2mpg with premium. I drive about 40,000+/year. bigtipper

3 out of 3 people think this is helpful.

my mechanic aggrees


do not use regular...HI Test only vehicle.


my 02 H6 runs terrible on regular

1 out of 1 people think this is helpful.

You can hang it up towing anything if you use anything less than 91 octane. No power.

1 out of 1 people think this is helpful.

I have an H6 3.0... it requires premium. Totally agree with "Big Tipper" the payout at the pump is the same since the mileage reduces significantly. The real problem is... Why is the power reduced running lower octane fuel. Answer: Detonation / Pre-Ignition! Which will kill your engine overtime. Detonation is when your fuel air mixture explodes in your cylinder before the piston reaches top dead center. This pre-ignition tries to turn your engine crank backwards. Not good at all. Strongly suggest to use the proper fuel for your engine.

Your Answer

Add photo

Related Questions

  • Premium Fuel Required? 5 answers

    I am thinking of buying one of these wagons. My question is: Does this vehicle require premium fuel? Or is it just recommended?

    2004 Subaru Outback H6-3.0 L.L. Bean Edition Wagon



  • why is there the need for premium gas? 7 answers

    Looking at purchasing used 60k. want to know more details about gas requirements.

    2005 Subaru Outback 2.5 XT Limited Wagon



  • How to choose the best Winter tires? Snow chains question? 2 answers

    The Subaru Outback owner's manual says you cannot use "snow chains ". So, what's the best option? All season tires? And, if you use all season tires does this reduce your fuel mileage? Some ...

    2010 Subaru Outback 2.5i Limited



  • What is excessive mileage or too little? 3 answers

    Assuming you do all the required maintenance at the appropriate intervals, what would you consider to be excessive annual number of miles driven per year? And, is there a minimum number of miles ...

    2010 Subaru Outback 2.5i Limited



  • does it require premium unleaded gas 2 answers

    2005 Subaru Forester XS


    Shopping & Pricing

Looking for a Used Outback in your area?
CarGurus has 13,313 nationwide Outback listings starting at $1,677.

Search Subaru Outback Questions

Subaru Outback Experts

#1 Nick Eidemiller
Nick Eidemiller
Reputation 460
#2 Jeff Smith
Jeff Smith
Reputation 380
#3 Tom Demyan
Tom Demyan
Reputation 370
View All

Related Models For Sale

Used Volkswagen Passat"
380 Great Deals out of 25,895 listings starting at $1,490

Used Cars For Sale

2002 Subaru Outback H6-3.0 For Sale
7 listings starting at $3,999
2003 Subaru Outback H6-3.0 For Sale
5 listings starting at $6,397
2004 Subaru Outback H6-3.0 For Sale
7 listings starting at $6,999