Running a few bottles of Redex through mine seemed to make a noticeable difference over the course of 3500 miles, but then it was done over 2.5 weeks...
Get the engine nice and hot and working hard- it seems to blow all the accumulated crap out of the engine. Some hilly motorway driving for a couple of hours made a noticeable difference to my 90 On a new diesel with a DPF, this sort of thing is recommended to get the exhaust temperature up, burning off the soot trapped in the filter. The principle is the same.
ok so its thrash the s**t out of it with redex in it,poly windows and aluminium roof .why just not fill the tyres and inside with helium as well?...or even better hydrogen then when i light up a cig i should go from 0 to 60 feet in 1 second.