Lucas Oil 40512 Deep Clean Fuel System Cleaner - 473ml

I was somewhat sceptical about any of these snake oils for cars actually working but this does seem to improve performance and fuel economy having used it a couple of times. I'm no expert and couldn't tell you facts and figures derived from extensive research but I know how my car drives and there is an improvement albeit slight. I would probably have to keep using this on a long term regular basis to see anything better happening but I have no idea if the extra expense makes it viable. I guess it might improve the life of the engine overall so if you are planning on keeping the car for a long time it could be peace of mind for you.

Does what it says on the bottle very effective at a good price

very pleased with this purchase, sellor prompt no issues arrived ahead of time. No issues with the product or the P&P. The car felt and ran so much more smoothly

My car was running badly, rough idle, lack of power etc. I changed the plugs which made a bit of difference, they were worn though. Bought some of this and put in petrol tank. Also cleaned out the inlet manifold and used this with a brush to clean the butterfly valve. Poured a bit neat into the valve and put it all back together. Set off down the road and opened it up, big puff of white smoke. Anyway car is much better since, just hope my antics haven't damaged the catalytic converter. Good product. Idle still not perfect, thing I'll do the air filter next.

Does as it's stated.

All fine!

saw a bit of a difference, use in conjunction witj 10020 fuel treatment.

Great