Jetta 125 TDI question.

[gh172]

I was looking into getting either a jetta or skoda rs in diesel. Are these cars fine to run on standard diesel or do you need to run them on premium diesel, thanks.

[team_v]

I would be running it on premium diesel, however i believe you can use standard diesel.

The better fuel economy witht eh premium fuel and the cleaning agents included are worth the up-front cost imho.

[Russ59]

I have a 2008 GT TDI Golf (purchased new) with the 125kw diesel engine and as I don't have access to premium diesel in my area it has always been run on standard diesel. I still average 800 - 900 kms a tank with a mix of city / hwy driving. I never let the fuel run too low and the most it has taken to refill was around 50 litres @ 860k's travelled. They have a 55 litre tank capacity so it would still have been good for a few more k's. I wouldn't mind trying a tank of premium in it, I'm guessing the main difference will be the Cetane level in the fuel but as I have already used a Cetane booster additive a while ago and found little or no difference to either economy or performance than I'm not really sure that the higher price of the Premium diesel would be worth it either. The biggest improvement I have found for both economy and performance was achieved through remapping, I'm running a performance map not an economy one and the 800 - 900 k's per tank is based on the performance map as well. Well worth the investment. My .02c worth anyway

[Spilledprawn]

I've got the same car as Russ59 (although not remapped) and I'm using standard and normal diesel. The premium has a slight economy advantage in my experience, not sure if it's worth the extra $. Can't say I'm getting the same range as Russ though. Mostly Hwy driving and I'm averaging about 850K's but filling up 55L (the tank filler pipe holds a significant amount

[Russ59]

I've got the same car as Russ59 (although not remapped) and I'm using standard and normal diesel. The premium has a slight economy advantage in my experience, not sure if it's worth the extra $. Can't say I'm getting the same range as Russ though. Mostly Hwy driving and I'm averaging about 850K's but filling up 55L (the tank filler pipe holds a significant amount

The remap has made a difference to the economy as well and although I don't constantly thrash the car, I do give it quite a bit of a fang as well, isn't that what a GT is for ? The fuel economy still amazes me though - so much grunt and so little fuel, it's the best of both world's.

[gh172]

Thanks for the replies, I wasn't sure if 51CZ diesel was a premium level diesel or not.

[poyta]

I have used both premium and regular diesel in my GT ( with re-flash ) . Don't notice any difference what so ever in either fuel economy or performance. I think those that claim to feel something different are just trying to justify the extra expense of the premium.