Originally Posted by
foama
1.) The fuel injection on our cars is into the intake manifold, just in front of the intake valves. It is not direct fuel injection, that would be injection directly into the combustion chamber. Direct fuel injection has the advantage of lower fuel consumption. Disadvantages are more complexity at higher expense, very much higher levels of minute particles in the exhaust fumes, and a tendency of intake valves becoming full of gunk due to the spray of fuel entering the combustion chamber directly, instead of the intake valves being sprayed and cleaned by the solvent action of fuel. Various direct fuel injection cars have a long history of becoming fouled up and repeatedly needing expensive repairs! Ours do not have these problems.
2.) Real turpentine was produced about up to the end of WW2. Today's turpentine is not actually turpentine, but a synthetic replacement, partly derived from mineral oil.
3.) Our cars have soundly built highly modern engines! The original 3A9x / 4A9x design came from a partnership between Daimler (MDC) and Mitsubishi. Those engines were built into the European Colt, the Smart For Four, and some others. That original design was later modified by Mitsubishi for our cars, but was also the basis for some later Mercedes engine products, as well as for a new and efficient Renault engine that is found in some Renault, Dacia, etc.
The 3A90 / 3A92 are very well and thoroughly designed engines, meaning an unusually high effort was put into the design. They will last very long if serviced properly and regularly. They have no tendancy of valves or piston rings becoming fouled-up. We don't need hocus pocus or any extra miracle wonder stuff for the Mirage.