The original 303 spec called for sperm whale oil to have better viscosity performance.
And since the replacement oil is NOT sperm whale oil, its considered false advertising.
The oil being sold "meets" the performance of 303 oil and will need to be re-labeled to meet the false advertising. Spermwhale oil has been outlawed under international treaties. And newer oil refining has produced superior oils than what was available in the 1960's when these specs came out. Some companies have alreadly re-labled their containers and are already back on the market. Also 303 is a john deere spec and they may have been part of the complaint or not.
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Today's Featured Article - New Life for an Old Allis - by Tyler Woods. My friend Jon, has an old '39 Allis Chalmers B. He thought it a marginal tractor that had long since served its time. She smoked terribly and never had much power but he couldn't afford another so he was limping along with what he had. Jon's Allis has a small front loader and though it doesn't carry much, it serves his needs. It was the hard starting and low power that made him think it was time to replace the old girl. Jon called me to help him discover why his tractor wouldn't start
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