05FX4-

Unleaded Gasoline Engines

If you experience starting, rough idle or hesitation driveability problems
during a cold start, try a different brand of "Regular" unleaded gasoline.
"Premium" unleaded gasoline is not recommended for vehicles designed to use "Regular" unleaded gasoline because it may cause these problems to become more pronounced.


That just doesnt sound right to me. So is it okay to use Premium gas if I do not experience problems?? I use premium gas always. And if I start to have problems do not use it. I mean after all we use Ethanol which has a much higher octane reading. I just dont understand how a better burning gasoline is not recommended.

SultanGris

Using high-octane gas in a car designed for regular accomplishes little except more rapid combustion of your money. Some refuse to believe this, claiming, for example, that premium gives the family Toyota better mileage or more power. These people are in dreamland.

Why exactly do you use premium?

05FX4-

I find Shell gasoline they have the best additives over others so I stick with them and I shouldve stated I use mid grade fuel not full premium. I just always have and probably always will

SultanGris

pretty sure they use the same additives in the lower grade and midgrade fuel, but its your money, you can do what ya want

Hunter2010

I stick with shell 87 octane. I will never use anything higher unless I buy a sports car. I know people will reply toggle saying how premium burns hotter and cleaner like someone previously used as an excuse on one of my threads. I'll bet my engine will run just as long as theirs if not longer on 87. As long as your not buying gas from 7/11 every time you fill up. I can see that leaving a lot of build up.

gasbrnr

Lower octain gas burns quicker and higher octain burns slower. Running low octain fuel in an engine designed to run on high octain will cause detintion which can damage the engine. Running high octain fuel in an engine designed to run on low octain will cause carbon build up leaving un-burnt fuel in the combustion chamber. This also is a waste of money. The main thing is to run good fuel with a detergent additive or buy the additive such as Techroline and add it your self occasionally.

Anyone that has run boats with Mercruiser engines knows it will void your warranty by running high octain fuel in most of their engines.

Hunter2010

^^^ I agree.

steelersphan

so what octane fuel is recommended for ford trucks

RadioMan

Even back in the OLD days, when I put 93 octane in my 55 Dodge with its 392 Hemi I'd reset the timing. The old Hemi ran just fine (even ate tires up) using 87 octane IF the timing was set correct.

With todays computer controlled engines, it will self adjust to burn as clean as it can no matter what octane you use.

Remember "spark knock"? Even early computer controlled engines had that problem. I *think* it's a thing of the past now unless you fail to do any upkeep. And yes, there are people out there that have know idea what a hood release is let alone checking anything under it, including oil and filter changes.

Daveh370

So running CAM2 in my truck is not a good idea