Just checked in the garage and the Millers is £7.99 a bottle. Maybe Bp Ultimate at 5 pence a litre more makes more sense over a years motoring. Then again each fill up will cost me an extra 2 pounds. each bottle of millers treats forty tanks full.
Yes but you maybe missed the point. Once it has done it's job and cleaned the injectors. There is no point in using it again for some time. All it is doing is costing you money. If you doddle about at low throttle or do a lot of town driving use it twice a year at most. If you give your car a bit of welly now and then and give the engine some high revving through the gears now and then, it's doubtful if you ever need it at all, as any carbon deposits are burnt off at with higher running temperature inside the cylinders.
If you read what millers say about their product;
Millers Oils - A World Leader In Lubrication Technology
That's pretty near to what Shell and BP say about their diesel.