It is a shame that some shops will deliberately cause, or fail to prevent, problems. It happens, of course, but no one has any idea how often.
I've read the same, Volvo exhuast systems, as well as Crusader, are designed better than Merc. Nevertheless, each manufacturers' packages have their own quirks.
Correct, Merc bases their gasoline engines on GM products. Incorrect about Volvo though; they also use GM based gasoline engines, as does Crusader. It has been quite some time since anyone has used a Ford engine, or even a Chrysler for that matter.
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