Mileage Per Gallon |
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CharlieM
Senior Member Joined: 23 Nov 2012 Location: N. Colorado Online Status: Offline Posts: 1797 |
Topic: Mileage Per Gallon Posted: 27 Jun 2013 at 11:55am |
Never heard of the damage thing, and many of the small truck/SUV manufacturers recommend premium when towing. As far as decreasing MPG, I can only relate my own experience, which has been a noticeable increase.
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Charlie
Northern Colorado OLD: 2013 RP-172, 2010 Honda Pilot 3.5L 4WD PRESENT: 2014 Camplite 21RBS, 2013 Supercharged Tacoma 4L V6 4WD |
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furpod
Moderator Group - pHp Joined: 25 Jul 2011 Location: Central KY Online Status: Offline Posts: 6128 |
Posted: 27 Jun 2013 at 12:12pm |
I know for sure we got some crappy lower octane than advertised (87) gas in the NC mountains, and when we had a really long hard pull on the interstate coming back, we got some wicked bad pinging for the two seconds it took me to shut the cruise control down when big Ex shifted to 3rd at 65mph. Next fill up we put in a higher octane (91), then got into the mountains again.. no pinging at what appeared to be the exact same conditions. (RPM incline, and road speed)
I don't think I have ever heard of damage from a higher octane being used, it just isn't always helpful or needed. Most modern vehicles will adjust ignition timing and spark to compensate anyways. Our GTi does that. It wants 93, but you can run it on 87.. and you can tell when you do. My guess is it cuts boost and timing advance pretty harshly, because merging and passing are noticeably different. |
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techntrek
Admin Group - pHp Joined: 29 Jul 2009 Location: MD Online Status: Offline Posts: 9059 |
Posted: 27 Jun 2013 at 1:53pm |
The opposite is true, the few vehicles which require 93 octane (usually sports cars) will be damaged if you put 87 into them.
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Doug ~ '10 171 (2009-2015) ~ 2008 Salem ~ Pod instruction manual
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