Jayco-noslide wrote:
First of all, make sure you really need it. There's no advantage to using premium in a motor designed for regular 87 octane. Just as an aside, I wouldn't buy a vehicle requiring premium because many proven, powerful engines recommend only 87 octane. Especially true with cars but I don't know how many trucks or SUVs recommend premium.
When I bought this truck (Ford 6.2L) I really didn't expect that it would need premium under any circumstances, and it may not really, but the manual recommends premium for towing and/or hot weather (funny they don't say what "hot weather" is) so since it is still new (warranty) and it is hot and I will be towing, I figure I'll go with what they say.
Not driving enough to worry about the cost, and as soon as the weather cools down, I can go back to regular anyway.