This has worked for me I use the shell nitro stuff as I put a tank in and noticed I had more miles on my mfa plus I had better throttle response and just noticed a improvement in the car! Plus I had no turbo boosting issues!
If you buy a cheap hand scanner scan your car for faults my fault was p0299 under/over boost to turbo... running a cleaner through and decent diesel seems to cure my issues!
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