Ask Honest John

Most recently answered additives questions
We are the proud owners of a 20-year-old Audi 80 TDI (bought from new), now with 174,000 on the clock. Over the past year it's lost much of it's pulling power. It struggles with even the slightest inclines...
When I looked up the Platinum Plus additive on Google it threw up several other additives also. All claimed to decrease fuel consumption, give smoother running and aid the DPF. Those mentioned were; Millers...
My Jaguar XF 3.0D kept coming up "restricted performance" and yes I have been using it for short runs. However, I got a bottle Forte turbo cleaner and a bottle DPF cleaner and put them in the fuel tank...
Some time ago you responded to a letter from a company that used some kind of additive in their diesel fleet vans. I think it was about £65 to buy but you only put in a small amount each time and it saved...
A few weeks ago a reader recommended Platinum Plus treatment for DPF problems. I am unable to locate a supplier of this product. Can you please let me know the details of where I could purchase this product....
I have a 1991 Volkswagen Scirocco GTll. At present I am filling my tank with Sainsbury's Super Unleaded and adding a Millers VSPe Power Plus fuel additive. I believe my car was converted before I bought...
I read with interest your article headed "Shelling out on Fuel" and the comments regarding Texaco. Valero has maintained the Texaco brand and general infrastructure. Texaco supply Super Plus Unleaded (SPUL)...
I have just bought the additive called Diesel power 3 from Wynn's because my DPF is now doing it's job at around 120miles so i thought now is enough! So I bought that additive and my question is: A Ford...
Setting off after parking my Volvo V50 1.6D DRIVe overnight in temperatures down to -16 degrees C, the car kangaroo jumped for a couple of minutes with the engine appearing to be cutting out. When joining...
Where do I buy Platinum Plus, as erred to in your DT motoring supplement today? All I get on Google are night clubs and, literally, 'Shagpads'!