2.5 hybrid engine requires Premium Gasoline?

[slooose42]

Ya you're right. I remember when i bought a new 1971 Plymouth Satellite Sebring and the manual said I could burn regular (it still had lead in it) or non-leaded. The first time I took it in, to be serviced, I asked the shop manager which gas he recommended. He looked at me and said, "see that '71 Plymouth over there, that guy ran non-leaded and it's in for a valve job." Enough said for me, I ran leaded gas for as long as I could get it, and then I finally had to change over to premium then HAD to change to non-leaded. Drove that car for over 30 years with out having to touch the engine. That's the honest to goodness truth. (I would have said God but they would probably frown on it and cut my post)

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[slooose42]

Check fine print on page 4

 

[bombast]

Check fine print on page 4

NOTE: See latest Maverick Dealer Ordering Guide for the most up-to-date feature availability and restriction information?

 

[nice sandwich]

Check fine print on page 4

The annotation is next to the horsepower and torque figures for the 2.0 drivetrain only.

 

[Bikeric]

Not reading thru 7 pages.......
My plan is use 87 Octane fuel.
How much better would pure gas be vs. the Ethanol mixed variety??

 

[Dad]

Manual shows 87 octane minimum; premium recommended if towing

You are correct

 

[NeedForSteve]

My 2007 Fusion's manual states it is safe to run E15 (I guess it's being sold as 88 octane now? haven't seen that local yet), but I ran exactly one 16 gallon tank of sheets E15 through it and the mileage difference between it and 87 octane was so bad I thought something was broken. I have no idea why but over that week I averaged like 22 mpg, when back then I was averaging a steady 27 mpg. Couldn't see the point of using it steadily in a hybrid.

 

[TooManyVehicles]

Sorry no link but Google July 2019 Car and Driver regular gas vs premium. They tested 3 cars and a Ford 150 using both grades. One of the cars was a BMW M5 and another was a Dodge Charger. Net was don’t waste your money on premium except for the Ford F150.

I rarely use anything but 87 in my 2015 3.5L EB F150, and I’ve averaged right around 20MPG over the 81k miles on it. That’s running snows/studded snows in the winter, with extra weight on the rear axle, and sometimes full of wood or hauling an L-series tractor. The only exception is when hauling, when I sometimes put 91 octane ethanol free in it.

 

[Turtle]

I have the same engine in my Escape Hybrid 43 MPG or better and 87 Octane.

 

[ffoc01]

Ethanol has about 67% of the energy density of pure gasoline.

That said, that doesn't mean you're going to get 33% more power or mileage out of it. The average gasoline engine only uses about 20-30% of the energy it gets from burning gas, and you end up pumping a bunch of energy out the tail pipe in the form of exhaust no matter what you do.

I think you're mistaken. Back in the day, Ethyl was the brand name for leaded gas. It had nothing to do with ethanol content. Until newer, safer fuel additives were developed in the 70s and 80s, cars indeed ran much better with leaded gas. It allowed for much higher compression ratios and the lead itself had lubricating properties which protected valvetrains. It worked well enough and was cheap enough that manufacturers had little incentive to phase it out until the EPA demanded its phaseout with new emission standards. It's also why you hear about old motors running unleaded, even premium unleaded, burning up their valves in those early days. Old valvetrains, designed for lead, needed the lubrication of the lead, so even though the octane stayed high enough to prevent detonation, the valves were essentially running dry without lubricant.

 

[bombast]

I think you're mistaken. Back in the day, Ethyl was the brand name for leaded gas. It had nothing to do with ethanol content. Until newer, safer fuel additives were developed in the 70s and 80s, cars indeed ran much better with leaded gas. It allowed for much higher compression ratios and the lead itself had lubricating properties which protected valvetrains. It worked well enough and was cheap enough that manufacturers had little incentive to phase it out until the EPA demanded its phaseout with new emission standards. It's also why you hear about old motors running unleaded, even premium unleaded, burning up their valves in those early days. Old valvetrains, designed for lead, needed the lubrication of the lead, so even though the octane stayed high enough to prevent detonation, the valves were essentially running dry without lubricant.

I was mistaken in that I thought he was talking about ethanol, but he was talking about leaded gasoline. So I went off and a tangent for nothing I suppose.

 

[Mymaverick2021]

I seen in the 2.5 hybrid engine specs that it has 13.5 to 1 compression will it require premium to run correctly

Read below 87 octane is the one

 

[Benson]

So whats the verdict on 87 octane v. Premium? Which is it? My 2017 Kia Niro hybrid runs perfectly now for 5 yrs and it has only used 87. I was told to use only 87 at time of purchase.

 

[Cris]

89 for me.

 

[Jville]

That's every car forum, unfortunately. Even the Ford guy from the KS dealer said something like "premium gives you better fuel economy" in one of his videos, even though that is not a blanket truth for all - or even most - cars.

Our G70 has a 2.0T GDI with 255hp. The G70 says "premium recommended" but there is zero difference. We've tried. There is no detectable difference in performance or MPG with premium, but there is a detectable and significant increase in cost per fill up.

Most named brand premium fuel has 2-3 times the additive package of the lower octane grades, which obviously helps mitigate potential carbon/sludge and injector problems. If you are dead set against an occasional premium fill-up, please consider a good fuel additive added every 3-4 tank fulls. Chevron Techron is considered one of the best.

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