Quote:
Originally Posted by ossiblue
I certainly don't qualify as an expert, but I happened to ask my mechanic--who is one--his opinion of both systems. He was trained in Germany to work on the MFI when it came out, and he much prefers the CIS. There are many more "wear" parts (ie. butterfly valves) on the MFI, and as the system wears, it becomes more and more difficult to run smoothly. He finds the CIS by comparison, more economical and easier to work with. He feels both systems are good if in running order, but he prefers the CIS. Again, I really don't know specifics, but this was one opinion from one who I respect, and will get this thread started.
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14 points of adjustment vs. one. It all boils down to that. CIS is bone simple. Ideal for a car you're going to use. MFI will be best for owners who are able or willing to deal with tuning and adjusting. The point about wear is well taken. When MFI wears out, it will easily cost $2500-3000 to rebuild the throttle bodies and pump and re-set everything, assuming you can find a mechanic who is able or willing.
There are buyers who will only buy MFI and buyers who will only buy CIS, so value comparisons are similar to sunroof vs. non-sunroof. An overall market survey might show CIS cars bring more money, but that may be equally related to them being the 'last of the longhoods.'
Having owned several of each, I'd add that a CIS T is going to deliver approximately 60% better real-world gas mileage.