Honda Civic Fuel, Oil, Cleaners & Other MaintenanceExtending the life of your Honda Civic requires the proper fuel, oil, and cleaners, along with other regularly scheduled maintenance. Keep your Honda Civic fuel and oil at the right levels to keep your Civic on the road longer.
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If you fill the car past when it clicks off you will fill up the vapor canister with liquid gasoline and over time it will damage it. Im supprised you havent gotten a CEL yet if you go till its almost gonna overflow.
__________________ Me - 2001 K20A2 Civic & 2005 Acura RL
NO CEL at all. I fill it up till it won't hold another ounce. I have done this every fill up. About 1 every two weeks or so for the last 3 years. No harm yet, that I know of.
If you fill the car past when it clicks off you will fill up the vapor canister with liquid gasoline and over time it will damage it. Im supprised you havent gotten a CEL yet if you go till its almost gonna overflow.
So other than the possible evap canister harm. Is there anything else I should worry about? I live in Oklahoma and we do not have to pass any type of emisions tests.
I go till it clicks than round off to the nearest dollar, like every normal person
Sujak - thats exactly what i do. or go to the nearest half dollar amount. so if i pump $16.24 cents, i just get it to $16.50 or 75 cents. i never put anymore than 1 extra dollar worth in my car. this is kinda scary to me finding this out in the first place cause i just bought an 07 Si and i've filled up the tank 3 times so far and i've done this "overfill" all 3 times so far. i'm hoping that i'm not doing much to hurt her
My step-father is a mechanic and he had some input so he told me their is no gain to going high octane but he said a mechanics trick is to run higher octane through your engine for about a week or two for like a cleaning because believe it or not it is cleaner but the purpose of higher octane is a total different issue like for a turbo etc.
its true, higher octane gas contains more detergents in the top teir program. but it is still not enough to matter, and certainly not enough to justify using high octane gas in a low compression motor. its much better to use something like lubecontrol.com in every tank. that actually works.
I'm probably the oddball guy here but I've experimented with all grades and 89seems to run the smoothest with my stage 2 cam. 87 runs way rich and I get no gas mileage like 280 to a tank on city driving. With 89 and 93 it bumps up to 320+. All highway I've hit 370-390 on a tank. Not sure which one makes more power I'll have to do some dyno runs with the different grades to really tell. 93 I ran leaner for some reason but it drove no better than 89 so I figured 93 was a waste even if I have no cat. Just thought I'd share my experience.
No its not bad... the consensus through these 18 pages are that its a waste for our fairly low compression civics that run perfectly fine on 87. Gearbox said it all... use some fp60 or other lubecontrol products.
If you are really concered about keeping the fuel system clean then I would say use Shell gas, they all have adatives to help do this. The only reason I don't use shell is they don't have 94 octane, like Sunoco
__________________ 2006 GPW S2k-current toy
2004 NHB EM2 w/K20a2-sold
2001 EM2-Wife's car
1991 Accord coupe 5spd- My daily
