Fuel Grade
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View Poll Results: What fuel Grade do you use

Voters
100. You may not vote on this poll
  • 87

    77 77.00%
  • 89

    11 11.00%
  • 91

    5 5.00%
  • 93

    7 7.00%
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Thread: Fuel Grade

  1. #1
    1st Gear RS LTZ's Avatar
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    Fuel Grade

    Fuel Grade is a debatable topic for the Cruze. I've been using midgrade (89) whenever I fill up. I've noticed more consistent mileage and slightly better mileage as well.

    Upon further investigating the Cruze's 1.4L ECOTEC Engine, I finally found the engine specs (link below), and noticed a compression ratio of 9.5:1. Now knowing that, I'm glad I put in midgrade at least, especially since it is a turbo car.

    Cars that require premium fuel usually have a compression ratio over, 10, ours being at 9.5 I think warrants a minimum of midgrade for better operation. But I'm not a Engines Engineer, and I know the Cruze has knock sensors that allow it to use 87 octane, but I'm sticking with midgrade or higher.

    http://www.caranddriver.com/var/ezfl...dffb210f44.pdf

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  3. #2
    Retired Moderator shawn672's Avatar
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    89 is yielding better fuel economy and more power according to my butt dyno then 87 did. There was a lot more hesitation with 87 and made the sluggish transmission feel even worse due to the hesitation

  4. #3
    1st Gear VictoryRed08's Avatar
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    Quote Originally Posted by shawn672 View Post
    89 is yielding better fuel economy and more power according to my butt dyno then 87 did. There was a lot more hesitation with 87 and made the sluggish transmission feel even worse due to the hesitation
    Hmm, maybe I'll spring for 89 next fill up.

    2011 Chevrolet Cruze 1.4t - 35% tint, K&N Intake & Black Bowties.

  5. #4
    Handbrake Released elwood58's Avatar
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    I will try 89 at my next fill as well.
    2011 Cruze LTZ (Black Granite Metallic)

  6. #5
    3rd Gear gfxdave99's Avatar
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    Ive been running 93 on my last fillup and have had better MPG and response.

    I'll go back to 87 on the next fillup for comparison

  7. #6
    3rd Gear
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    cheap and light foot, 87 for me!

  8. #7
    1st Gear RS LTZ's Avatar
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    I'm glad I wasn't the only person with the higher octane preference

  9. #8
    World Rally Champion 70AARCUDA's Avatar
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    ...wonder if the "higher-is-better" attitude continues when gasoline prices climb toward $4-$5 later this year?!?!

    ...I doubt it...except maybe during certain "race" weekend outings (ha,ha).
    • 2011 Chevrolet Cruze LTZ 1.4LT 6A
    • 2009 Pontiac Vibe 1.8L/SFI 4A
    • 2004 Pontiac Vibe 1.8L/MFI 4A

    • 1971 Dodge Charger 318 3A
    • 1970½ Plymouth AAR 'Cuda 340/6BBL 4M
    • 1968 Dodge Charger 383 3A
    • 1967 Plymouth Barracuda Formula-S 383 4M
    • 1965 Plymouth Barracuda Formula-S 273 4M

  10. #9
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    Ok, so it sounds like 89 is giving better results, but are you actually saving money using the higher fuel grade?

  11. #10
    World Rally Champion 70AARCUDA's Avatar
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    ...I'll bet it'll end up being a "...buy it (89-91 octane) when you need it..." situation in the long run for most people...such as driving through mountainous areas, pulling heavy loads, etc.
    Last edited by 70AARCUDA; 03-22-2011 at 09:38 PM.
    • 2011 Chevrolet Cruze LTZ 1.4LT 6A
    • 2009 Pontiac Vibe 1.8L/SFI 4A
    • 2004 Pontiac Vibe 1.8L/MFI 4A

    • 1971 Dodge Charger 318 3A
    • 1970½ Plymouth AAR 'Cuda 340/6BBL 4M
    • 1968 Dodge Charger 383 3A
    • 1967 Plymouth Barracuda Formula-S 383 4M
    • 1965 Plymouth Barracuda Formula-S 273 4M

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