BOB - what do you mean it's time for bed? It's 11:50 here in Rhode Island - the night is still young.
KEN - Following last weeks oil postings by Jim D and Hydro Harry I started to do some research of ZDDP (Zinc Salt of Dialkyl Dithiophosphoric Acid aka Zinc Dialkyl Dithiophosphoric Acid Salt). I'm trying to get the ppm specs for the following:
Tractor Supply Co. – Traveller SAE30 Lawnmower Oil (made by Warren Oil Co.: TSLM30PL)
Tractor Supply Co. – Traveller Heavy Duty SAE30 (made by Warren Oil Co.: TS02302G)
John Deere – Torq-Gard SAE30 (made by Conoco-Phillips) – unable to get the ZDDP ppm
Shell Rotella SAE30 - 1000 ppm
Kohler Magnum SAE30 (made by Warren Oil Co.)
Case/IH Low Ash Engine Oil 30W (737-3029 Qt, 737-3061 Gal)
Currently only Shell has provided a ppm figure, and Conoco-Phillips (maker of John Deere's Torq-Gard) can't or won't provide a ppm figure.
I would expect that Kohler Magnum SAE30 (which is for Kohler K-series and Magnum engines) would have a high ZDDP ppm, but I'm still waiting for an answer. Tractor Supply says their Traveller SAE30 Lawnmower oil is made to Kohler specs, but I'm waiting to hear from Warren Oil Co.