I found using Shell Optimax that my EB went through more fuel then if I was just using normal unleaded. The injectors started having problems after switching to Optimax. Putting Spitfire didn't help much, so I had the injectors replaced and ran it on normal unleaded. It runs.. err ran fine just with normal unleaded and I got better fuel economy.
Now I use Vortex and Valve Saver in the MkI, haven't had a problem with it. Although that thing does run on the smell of an oily rag. :P
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1993 EBII GLi Auto, 4.0L MPI rebuilt by JMM, JMM Dev1 kit, JMM Hi Flow Cat, still to hit the quarter mile.
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