What fuel?

J

jayb

Member
Hi all,just picked my Zed a 2.2 with 80k and full history. Really pleased so far but is it best to run on Super or normal 95 ron? Will post pics whe I work out how to!
 
Welcome and glad you're enjoying ownership!

I run my coupe on 95RON usually (supermarket) with no problems so far!

I do occasionally give her a treat with some Shell Optimax or similar. Some people have reported problems with sensors in the exhaust I think when using cheaper fuels, with said faults then clearing once they switch to more premium fuels.
 
I think the six cyl engines were designed to run on super-unleaded, for the extra 50p or whatever for a tank it's worth it for peace of mind, it's supposed to make the engine cleaner inside as well :driving:
Regards
 
Normal unleaded will be more than good enough. You might get a few more mpg out of super so find the cost evens out.

Bottom line is either will be OK.
 
I would do a search on the forum and you will see a huge amount if posts on the subject.

I don't think there has been a definative answer to the question yet.
 
I always use (& previous owners) shell vmax. Higher octane and very consistent across the country. Mines a z4m but I used 1 tank in 4 in my old standard 3.0ltr and noticed the difference every time. 8)
 
This one relates to v power.

http://www.z4-forum.com/forum/viewtopic.php?f=23&t=62261&p=1030151&hilit=Fuel+Octane#p103015
 
Thanks for all the replies, I guess it's a case of give both a try and see what how they perform. As for the pics... I'm obviously a bit of a thicko as I've tried and failed. Love the car though!
 
ronk said:
I would do a search on the forum and you will see a huge amount if posts on the subject.

I don't think there has been a definative answer to the question yet.
Click to expand...
Or any other performance car forum.

This one's been discussed everywhere for years - And the consensus appears to be - nobody knows.

HTH :D
 
On this forum - a 2 bullet point summary for the E85/86 would be:

- All engines (note exception below) will happily take 95 Octane without issue. With 99 octane fuel economy may improve, along with (debatable) slight improvement in performance

- S54 engine found in the M variant, most owners will tell you that the engine doesn't run as well on 95, so 99 is preferred.

Try both fuels and see for yourself. Won't do any harm


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Unless there's a huge (5p/ltr+) price difference I have always fuelled my BMWs with super where possible. I believe they are fitted with knock sensors and are built for 98+ octane, but will run with 95 obviously.

I did see someone on a forum did a fairly scientific test on an e46 320i and they got enough miles more out of the super to offset the cost, or there was nothing in it either way. So I go for Super, with all the benefits.
 
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