By all accounts, the 4BD1 is not fussy; any decent 15w40 Diesel oil will do the job. Being an old tech diesel - ie dirty but uncomplicated - I would think changing it regularly is much more important than using a particular brand. Castrol RX Super is popular - and is generally what I use as it's readily available at a reasonable price and has a good reputation. A quick search will give you plenty more options if you like. Some people report smoother, quieter running or less blowby with one oil over another but I can't say I've really noticed much difference when I've tried Mobil Delvac / Shell Rimula on my '85 550K klm old N/A. Blowby is good and it's always pretty noisy and harsh![]()



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) turbo, p/steer, RFSV front axle/trutrack, HF, gullwing windows, double jerrys etc.

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