Liqui Moly 5156 Pro-Line Diesel System Cleaner 500ml

Great products as usual .

I used to use BG products in my bmw 120d but it’s hard to get now, I found this liqui Moly after a bit of hunting and reading a lot of reviews. I only used half a can in 60 Lts of fuel to start with but within a few miles it was working, it felt a bit more responsive now after a few tank fulls of fuel it has pushed up the mpg from 49 to 54 around town. I have also used there engine flush and I am very happy with that to 👍

This treatment did make a difference especially with reducing smoke. As I have not used any kind of treatment in the last few years I think I need another treatment and then use annually when servicing.

I used the product on a Mercedes B Class W245 2008 180Cdi. The car was not pulling as it used too and fuel consumption was higher. After adding the Pro-Line Diesel System Cleaner to a full tank and drove around 25 miles the engine started to be a little bit smoother and you could feel the car pull properly when accelerating. The engine sound is better as well and the mileage improved from 32 mpg to 41 mpg. So, I am very happy with the product.

Good product!

Managed to pass my MOT after Fail cos of emissions used this product in my 3 series BMW, emissions decreased noticeably, also noticed quite big improvement on MPG, from 35MPG went to 42 MPG, engine sounds better and feels that accelerator responding much quicker.

Works as stated , I will be using this from now on.

I was a bit sceptical, however, very pleasantly surprised especially with mpg increase. According to trip computer fuel consumption on a long run was averaging about 38-40mpg previously, after treatment I managed close to 50mpg on a similar run. Engine seems a bit more responsive too, but that may just be my perception...