Swamp45755 Posted March 13, 2018 Report Share Posted March 13, 2018 I just recently purchased a 2018 Ford C-Max hybrid. The operators manual recommends premium fuel at 91 octane or higher. Fords website recommends regular of 87 or higher. Which is it? Quote Link to comment Share on other sites More sharing options...
obob Posted March 13, 2018 Report Share Posted March 13, 2018 http://fordcmaxhybridforum.com/topic/7031-fuel-type/ ptjones 1 Quote Link to comment Share on other sites More sharing options...
jestevens Posted March 14, 2018 Report Share Posted March 14, 2018 (edited) I wouldn't bother with Premium fuel, I've been running mine on 87 Octane for the life of the vehicle and it runs fine. If you really, really want to wring out every possible MPG then I guess maybe it makes a difference but frankly in PA the gas tax is significant enough that it's not worth it to me. The C-MAX doesn't have one of those "Premium Fuel Only" stickers on it anywhere that I can see like some of the more expensive vehicles. Edited March 14, 2018 by jestevens Quote Link to comment Share on other sites More sharing options...
ptjones Posted March 14, 2018 Report Share Posted March 14, 2018 I figure I get 25 miles more with Premium, I try to get it at BJ's or Sam's to cut down on the difference in cost over Regular. I regularly get around 700 miles on a tank or 52mpg. :) Paul Quote Link to comment Share on other sites More sharing options...
jestevens Posted March 15, 2018 Report Share Posted March 15, 2018 For the last four days the morning temps have been in the high 20s, low 30s here, so my MPG has been about 32-35MPG. Quote Link to comment Share on other sites More sharing options...
ptjones Posted March 15, 2018 Report Share Posted March 15, 2018 For the last four days the morning temps have been in the high 20s, low 30s here, so my MPG has been about 32-35MPG.If that is OK with you, Fine but you don't have too. :) I thought you had seen My How to get Great Gas Mileage Videos, the worst FE this Winter for me has been 44.6 mpg with low temps, head winds and climb in elevation and averaged 49.7 mpg for the last 10 fillups. Think Grill Covers. :) Paul Quote Link to comment Share on other sites More sharing options...
fbov Posted March 25, 2018 Report Share Posted March 25, 2018 (edited) This nicely shows the potential benefit of premium, ethanol-free fuel, which benefit clearly increases as temperatures rise above freezing. Sorry, Paul, but it still doesn't get cold in Georgia... Frank Edited March 25, 2018 by fbov Quote Link to comment Share on other sites More sharing options...
ptjones Posted March 25, 2018 Report Share Posted March 25, 2018 At 30*F you have lost 8 mpg over 70*F and you are right that it keeps getting worse as you go down more. :sad: Paul Quote Link to comment Share on other sites More sharing options...
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