Fuel Additives
The more expensive high octane fuel with additives is say 10p/litre more. My 1999 V70 T5 does around 8,000 miles a year, at 28mpg (6.2miles/litre) and so uses about 1290 litres, costing an extra £129 p.a. to keep the engine cleaner than using supermarket cheap unleaded petrol. You pay your money and make your choice. Using Wynns at £5-6 good for let's say 258 litres, I would spend £25-30 on injector additive, but this doesn't help with better fuel economy because of higher octane fuel which adds about 1 mpg or 0.22m/litre, which is equivalent to a fuel saving of about 56 litres = £65-70.
Summary - with additive cost and extra cheap fuel (27 mpg instead of 28 mpg) = £90-100 p.a. (25to30+65to70) or Shell V Power £129 extra fuel costs, smooth engine running and no messing about.
|