Wynns 76401 Formula Gold Diesel System Treatment - 500 ml

Gets rid of black smoke

Was recomended to try this as my egr valve was sending my x type into limp mode. Purchased Formula Gold and filled tank and added this. The results were almost instant and i would highly recomend this product.Read full review

Verified purchase:  Yes • Condition: new • Sold by: sparesworlddirect

OK bjut not for me

It made no difference at all to the running of my diesel. But that doesnt say it is a bad product it says the fault is probably not due to blocked jets etc. I will have to investigate further. Therefore I am not really qualified to say if this is a good product. Thank you.Read full review

Verified purchase:  Yes • Condition: new • Sold by: millparts

Performance at a cheap price

This is the 1st time I have used this product and am impressed, I think I shall use it every 5ooomiles as it certainly seems to 'clean' the engines performance especially the torque which feels stronger the car pulling well and cleanly.
A great product which we can all affordRead full review

Verified purchase:  Yes • Condition: new • Sold by: tek.automotive

Worked for me

Just passed MOT, tester struggled to get a reading or any smoke and it passed on fast pass! Levels were loads lower than last year and I follow the same routine prior to test, so can only put it down to this stuff. Worked great in a 2008 Saab 9-3 TTiDRead full review

Verified purchase:  Yes • Condition: new • Sold by: ecusdirect

Great product

This product is amazing, it worked within the first few miles of use. Cleared up the smoke I had coming out the back and I passed my MOT without any emission problems. engine runs so much more smoother now also. Read full review

Verified purchase:  Yes • Condition: new • Sold by: fastcardirect_w...

Liquid Gold

Put a bottle of this in my TD4 and filled up with ordinary diesel, not supermarket. Made a massive difference. Runs much smoother and better acceleration. Will use again.

Verified purchase:  Yes • Condition: new • Sold by: millparts

Very good engine cleaner

My diesel car picked up the minute I put this in,started great and runs great to. I had an emission sensor warning light on the dash and it’s gone out to..great product.

Verified purchase:  Yes • Condition: new • Sold by: acc4u

I think it does what it says on the labe.

The car was running ok before this additive, and ran the same after using the additive ??
The jury is out. It was recommended to me by a garage comrade, to try because of the high mileage of my car. To quote him, it is advisable to be on the safe side. ! !Read full review

Sorted my blocked DPF filter

Extreme lack of power due to blocked DPF, this stuff sorted it out after only 2 applications. Excellent product, much better than the rest on the market! Would recommend to everyone.

Verified purchase:  Yes • Condition: new • Sold by: autogear247

Wynn’s Formula Gold High Performance Diesel System Additive 500ml

After adding & running my engine for about 10 miles, I took it to a garage for a fuel emissions test, which proved to be 0% in toxic emissions - so the additive has definitely helped.
Will thoroughly recommend. Read full review

Verified purchase:  Yes • Condition: new • Sold by: sparesworlddirect

Cleaners are not all the same.

This stuff does what it says, straight to the point. Cleans the fuel rail, pump injectors, crowns, valves if all carbon deposits. Makes the motor run smother.

Verified purchase:  Yes • Condition: new • Sold by: fastcardirect_w...