Just changed oil, air filter, and mower blades on my John Deere Z915e which has the 25 horsepower Kohler engine. Mowed afterwards. Used 15w-40 vs 10w-30 as per recommend on here. So far so good.
To me, from a consumer's perspective (not an attorney), there is a difference in expectation moving from "made from" to "made with."
I get it as it takes away from Ultra's differentiation. Performance downgrade? Doubtful. Maybe a good question for the next Pennzoil Q&A?
The new one quart jugs of 0W-40 SRT (left) say "made with natural gas" and old (right) says "made from natural gas."
New quart date is January 05, 2026.
Old quart is 2023.