I have added wrong fuel for 3 years
Thread Starter
Junior Member
Joined: Nov 2011
Posts: 22
Likes: 0
ML 350
I have added wrong fuel for 3 years
I bought 2012 Ml350 at the end of 2011. Milage 30k now.
Did not pay much attention on fuel.
I have been adding #89 for 3 years.
Just realized it requires #91 or above.
Anyone can tell me if there is bad outcome down the road?
Any action I should take?
Thanks a lot.
Did not pay much attention on fuel.
I have been adding #89 for 3 years.
Just realized it requires #91 or above.
Anyone can tell me if there is bad outcome down the road?
Any action I should take?
Thanks a lot.
Senior Member
Joined: Mar 2014
Posts: 387
Likes: 2
2014 ML350 BlueTec
The only result for your error is you have saved money. You vehicle will be just fine and no harm has been done. The octane is only a recommendation from the maker to get the horsepower in their specs.
Junior Member
Joined: Feb 2006
Posts: 57
Likes: 0
2014 ML 350 bluetec
Junior Member
Joined: Dec 2014
Posts: 60
Likes: 2
From: Calgary AB
2012 ML350 BT, 1998 BMW 540i/6
This is an often debated topic on the internet. Your engine should have had less mileage and less power running on lower octane.
As far as lasting damage, the engine knock sensor should have retarded the timing to avoid pinging due to the lower octane. If it was successful, then there should be no damage to your engine at all. You would notice the pinging the most under hard acceleration.
Its wiser to run an engine requiring high octane on high octane.
As far as lasting damage, the engine knock sensor should have retarded the timing to avoid pinging due to the lower octane. If it was successful, then there should be no damage to your engine at all. You would notice the pinging the most under hard acceleration.
Its wiser to run an engine requiring high octane on high octane.
Super Member
Joined: Nov 2009
Posts: 724
Likes: 31
Car free at the moment
You're fine. Mercedes engines are designed to run on European regular, which is 95 RON octane. The U.S. uses pump octane numbers, so the values are not comparable. The 95 RON equates to roughly 89.5 or 90.0 octane in the U.S. So you're a little bit shy of the desired octane number, but not enough to matter.
