Trying to find out why my 300d loses power after it has been running for a few hours on highway traffic. Have been adding WVO directly to the tank this summer, maybe not well filtered, but have drained the tank and have been running on pure diesel for a half tank when it happened again. Have replaced fuel filter and while there was clearly some carbon bits from the fryer oil, it wasn't too bad. Thought maybe the lift pump, or possibly injectors are fouled, but once the car cools, it seems to run okay again.
Anyone had a simialr experinece?