Join Date: Jul 2006
Thanked 247 Times in 199 Posts
A few things I'd like to add/clarify...
1. A flashing MIL ("check engine light") means that one or more cylinders are currently misfiring. If you continue driving while the MIL is flashing, you could melt your catalytic converter and wash the oil off the affected cylinder wall(s) causing severe wear.
2. The engine is tuned to run on a minimum of 87 octane gasoline. The engine does not require gasoline with an octane rating higher than 87. The use of a higher octane gasoline will not harm the engine. In fact, Honda recommends the use of 87 or higher octane gasoline - there is no upper limit specified. However, any power gains will be modest and limited since the engine is not tuned to take full advantage of the higher octane.
3. Feel free to use a higher octane gasoline if it makes you feel all warm and fuzzy inside - the oil companies will thank you for it, but there is no financial advantage to using higher octane gasoline for the Accord. Let's say you drive 1,000 miles per month and regular is $2.97 per gallon (current national average) and you average 26 MPG - that's $114 per month in fuel costs. If you get 28 MPG by using premium, that's $125 per month at $3.50 per gallon - about $11 more per month for nothing. The car won't ride more smoothly, you won't get to work any faster, and you won't get more bass from the speakers.
4. We're talking about a Honda Accord here. It's a mid-size family sedan with polarizing looks and good handling for its class. It's not a luxury car even though it has leather and fake wood. It's not a race car even in Sport trim with a manual transmission (which is much slower than the automatic). It's less expensive than the average new car in 2017. This is a common car designed to run on common gasoline for the common person.
5. I can think of only one compelling reason to use premium gasoline in the Accord - if you're competing in a sanctioned event against another, identical Accord and winning involves a trophy or cash prize, you might win by reaching the quarter mile 0.1 second faster if the other driver is using regular gasoline. However, a Honda Accord is completely the wrong vehicle for this type of competition.
2019 Honda Ridgeline RTL-E