If I assume that 7,500 is Mitsu's original intent (not withstanding smartUSA's 10k "Oil Service Plus" deal), and if I further reduce that interval by the 1/3 commonly recommended for my severe service, I get what? - 5,000 miles.
7500 miles on dino/fossil oil,is the max OCI. But syn oil anywhere from 8000-12000 mile OCI. Also conditions and type of driving are the major deciding factors for both oils. Back to the thread on Mitsu engine. A good source of info can be found on mini trucks blogs because the Mitus mini truck has the 660cc in it...
3G83 variants (660cc triples), including possibly the 3G83T, a 15-valve turbo. Even though it is a different engine, original Mitsu service info on it could be useful to us.
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