Oil type for engine, gearbox and diff

[Zolpidem]

Hello, what is your suggestion for engine, gearbox and differential oil for a 2400? Spring and summer use, not severe cold weather.


I’m sure this subject has been already discussed, but I couldn’t find it..

[Tobi]

Engine mineral 20W50
Gerabox: Fiat ZC90 (no EP) / Castrol B 75W
Differential: Fiat Tutela W90/M-DA

[Ribolla_67]

If you are looking for the best suitable Dino engine motor oil, you have to consider that original Ferrari engine oil was full synthetic Shell 20w50, whereas Lancia used full synthetic AGIP or Mobil 10w50 for the stratos. They always implemented the latest and greatest lubrication technology...

After long investigation and discussions with my colleagues (my profession is engine development) we found out that the most suitable oil for Dino engines is Mobil1 5W50.
- hot viscosity similar as STRATOS oil
- cold viscosity better than 1974 - better cold start protection
- reasonable ZDDP - camshaft protection
- relative high content of sealant conditioner
- resistant to Dino engine gear & chain drive (in contrast to 20w50)

For several reasons, it is detrimental to use mineral 20w50 for a Dino - why did Ferrari/Lancia use full synthetic 10w50 oil 50 years ago?

Hope I did not start an oil thread again as 3 Dinoisti = 5 opinions on engine oil