There has been a MINIMUM of 7% biofuel in diesel for a few years now - it's part of EU standards that all cars have to meet so there is NO chance that Hyundai or any other brand are compatible with the fuel.

There have been some contaminated batches of diesel just before Xmas, predominantly along the eastern side of the UK - since fuel of all brands comes from one source in a specific area, with branded additives added later then you may just have been unlucky.

Edited by RT on 16/02/2014 at 19:51

The car is a Diesel 1.6 CDRI. 2011 Reg. The car has been 'sluggish' for about a month before it cut out (two new tanks of fuel during that period- the car was 1/2 tank full when cut out) it is still hesitant when accelerating. The car is drivable - just my confidence has been knocked. I was charged by a Hyundai, for an hour’s labour and a new filter cartridge was fitted. With 20% VAT the cost was £118. My issue with regards to labour and cost is that the car is under warranty and Hyundai suggested that Shell was at fault therefore the warranty would not cover it. Shell begged to differ in their email. I really want to know is this a common occurrence with Hyundai? Apparently lots of Fords have been having the same issue (woman at Hyundai). Or I am I being fed a whole lot of twaddle??!!

Hi Mitch29

Sorry to hear of the troubles that you are having. I have a similar i30 - but an auto and a year older. I have had no troubles with bio fuel (touch wood), Nor can I recall any mention of such troubles on any of the UK /Hyundai forums.

I do run a little injector cleaner in mine every 3 months or so, or alternatively use a tankful of VPower fuel (seems to sort occasional uneven running @ 1500rpm, a few minutes after start up).

I would suggest that you maintain the Hyundai service history for sake of warranty, which in simplistic terms means using a dealer so as to save any argument. I know they tell you can go anywhere though but is it worth risking the warranty? If in any doubt, ask Hyundai Customer services (I think a contact address is on back of service book). HUK Customer Services are sometimes helpful (& sometimes not so!).

My own i30 experience has been rather sorry - with lots of flaws and faulty components despite owning and caring for the car since day 1 for 40,000 approx miles. Hence I stress it is worthwhile maintaining the warranty. Its not a bad car - just not nearly as good /durable in my view as a Golf, Focus, or Astra etc.

Good luck

Edited by Talking Hoarse on 17/02/2014 at 11:28