Re: My verdict on Optimax
I tracked every tank of fuel in my 1.8TS from 1999 to 2004 over 45,000 miles.
In mine, Optimax was much better on a run (7-8%), which made it cost effective but the economy was no better round town! I used to have to make a choice what sort of driving I was going to do when deciding what to use in each tankfull!
Having said that, the engine was noticeably better running on Optimax. After some months of supermarket fuel, it used to "hesitate" at low revs in high gears (trundeling along at 35 in top...). Using Optimax stopped this.
I tried Optimax in my JTS and, at first, it seemed to make no difference, but have tried it again and the trip computer shows an average of 39.0mpg over two separate 80mph 340 mile trips to Newcastle & back! I know that the computer overreads by 3-4 mpg, but that's still brilliant!
2004 Silver Audi A3 2.0 TDi S-Line DSG (eBay!)
OEM Xenons (retro-fitted), PIAA silicone wipers, integrated Parrott CK3000 bluetooth phone kit, O2 XDA2 PDA/phone with TomTom wired GPS
Ex - 1999 156 1.8TS SP1 (1999-2003) + 2002 156 2.0JTS Turismo (2004-2006) (fell off Snake Pass backwards at 60mph...)