Toymods Car Club Inc: Tech & Conversions => Optimax warms engine faster than Ultimate?

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improvedae86
Forums Junkie

Location:
Melbourne
Registered:
January 2003

Re: Optimax warms engine faster than Ultimate?	Fri, 15 October 2004 22:41

Well from a Dealership point of view here are problems i have seen from the use of optimax . 1.Check engine lights on / Ecu fault codes logged , continues on after reseting due to inconsistent mixing of the fuel { yes have had fuel samples tested } 2.Damaged oxygen sensors / Lots of money with the new euro emission regulations , most cars running three for a four cylinder . 3.Pinging after a few days in the tank / or could be old fuel in station pumps . When you have all the cars filled at the same station , you get to see this doesn't occur filling up just after a tanker has been there . Could be related to the Toluene level . 4.Fuel system blockage / Fuel pumps in general most effected , Have to remove and flush fuel system due to blockage caused by the high levels of wax residue left over from fuel . Seems to build up more in pumps than fuel filters ? but most return-less fuel systems on modern cars have the filter in the pump , so is normally a $1000 job . 5.Black smoke if vehicle left idling for a say 5mins , then accelerated hard , also under hard acceleration . Even in new cars . 6.Poor cold starting After so much time investigating these fuel problems , we stopped spending hundreds of thousands a year on Shell and moved to Bp without a problem . As for customers still using Shell there problems still remain . And from my own experiences , Carby cars , eg 40mm webered 170hp 1.7 boxer engine / Low idle speed on hot days , think the engine is going to stall always . Consant blocked jets , or air correctors after driving slowly . never a problem driving hard . Poor fuel acconomy , about a 1/4 than other fuels . Injected cars , eg early fuel injection systems , Pinging under light loads like overtaking slowly at 100ks , inconsistent idle . Injected cars , eg late , turbo .low ks per tank . Black fuel smoke even with air fuel meter connected , car perfectly tuned testing on dyno , Crappy cold starting , Pinging under hard acceleration . Last track day used that fuel in : Filled up at the shell next to me in the morning on the way to Sandown , drove around Sandown allday . Car was performing ok till 1/4 tank of fuel then started to hear pinging under load at 5000 rpm in top gear ? Why is this , Went and refilled at the Bp next to Sandown , car was 3kph fastest up the back straight with a higher fuel load . Figure that hp loss {looks at Stewart} As for Mobil Heres a joke for Bm dealership people . What to you get when you add Mobil one with Mobil 8000 in a eight cylinder Bm engine ? Answer , you get a one cylinder Bm V8 . I remember visiting a friends dealership seeing rows and rows of engineless Bm's , why well i am sure you could find the correct cause due to i think Bm took Mobil to court over it . But what a remember it was something like the fuel turned the oil to jelly in the sump , and corroded the bores away because of some additive . Very expensive one that Well at least people can buy Bms with low ks on the engines What about the plane avagas ? remember that . As for Bp once again , no problems i have ever seen for myself . Edit { note too self to never uses shell at the track again } [Updated on: Fri, 15 October 2004 22:46] [Report message to a moderator]

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