I mistakenly put 87 octne fuel in my tank for my BMW 325ci - I usually put 93 octane in it. Will this damage my engine - the tank was .25 full before I put in the lower octane gas.

scoport5
10

Asked by scoport5 Jul 23, 2013 at 03:21 PM about the 2003 BMW 3 Series 325Ci Convertible

Question type: Maintenance & Repair

6 Answers

DavidH25
Not Active

No worries. It will do no harm.

4 out of 4 people think this is helpful.
scoport5
10

Thank you!!!

1 out of 1 people think this is helpful.
tennisshoes
18,455

David is right 1 tank shouldn't be a problem but if you are worried just put in some good octane booster.

3 out of 3 people think this is helpful.
RickELake
575

no harm done - just don't make a habit of it or your engine will start pinging....

1 out of 1 people think this is helpful.
Michael Tutty
4,375

Your engine will start pinging as soon as the high octane in the lines is burned off, which won't be long. You will also find that the computer retards the timing to stop this, and the timing will retard so far that the car will barely run, will have little power and will burn gas like a road warrior. Add octane boost now, and then at the 3/4 tank mark, top up with the super-high, 94 octane, or what ever the highest is you can get. Do that for a couple of times, and then go back to your normal grade of fuel. At the price of a replacement engine, it is better to take no chances on causing damage.

1 out of 1 people think this is helpful.
tommcmanis
3,425

Cheap fuel wont hurt it at all poor performance is all and crappy mileage

1 out of 1 people think this is helpful.
You think this is helpful.

Your Answer

Related Questions

3 Series
Looking for a Used 3 Series in your area?
CarGurus has 35,058 nationwide 3 Series listings starting at $1,800.
ZIP:

Search BMW 3 Series Questions

BMW 3 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 1,040
#2 Robert Charlson
Robert Charlson
Reputation 740
#3 Matt Mankinen
Matt Mankinen
Reputation 720
View All

Related Models For Sale

Used BMW 5 Series"
548 Great Deals out of 18,281 listings starting at $1,500
Used BMW M3"
57 Great Deals out of 1,254 listings starting at $5,999
Used Mercedes-Benz C-Class"
664 Great Deals out of 19,694 listings starting at $1,999
Used Audi A4"
250 Great Deals out of 10,208 listings starting at $1,800
Used BMW 7 Series"
143 Great Deals out of 5,702 listings starting at $2,895
Used BMW X5"
286 Great Deals out of 7,953 listings starting at $3,995
Used BMW 6 Series"
92 Great Deals out of 2,830 listings starting at $12,900
Used Mercedes-Benz E-Class"
661 Great Deals out of 19,198 listings starting at $1,555
Used Ford Mustang"
796 Great Deals out of 29,600 listings starting at $1,500
Used Honda Accord"
1,118 Great Deals out of 81,974 listings starting at $1,000
Used BMW 1 Series"
69 Great Deals out of 1,336 listings starting at $11,883
Used Acura TL"
238 Great Deals out of 6,838 listings starting at $1,100

Used Cars For Sale

2014 BMW 3 Series For Sale
64 Great Deals out of 14,254 listings starting at $29,000
2013 BMW 3 Series For Sale
90 Great Deals out of 2,218 listings starting at $25,877
2012 BMW 3 Series For Sale
38 Great Deals out of 616 listings starting at $22,999
2011 BMW 3 Series For Sale
362 Great Deals out of 6,856 listings starting at $14,990
2010 BMW 3 Series For Sale
38 Great Deals out of 604 listings starting at $13,950