As i take it, you guys basically decarbonize the engine right? Well, let's say if an engine which has been driven completely on a fully synthetic engine oil with Hi octane only, would it still be requiring this decarbonizing procedure? I personally don't think there's much to clean in such engines. ( both the fuel and the oil claim to prevent carbon build up in your engine and we're talking about ideal situations here i.e.a good oil and good fuel)
Also, is there any precaution for turbocharged/supercharged engines?