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Strictly by sound and feel. Even without sensory confirmation I expect the higher viscosity and a dose of ester will be beneficial for an old engine.

Thanks Y'all!

POE stands for polyol ester. "Advanced POEs" are ones made with a high concentration of low methylene hydrogen acids, which substantially reduces bulk oxidation and thin film coking at high temperatures.

Is this true for the dual cylinder engines?

Are these the valve cover bolts?

Engine is a 26 HP Kohler Courage installed on my Scag Turf Tiger. I have been using Mobil 1 EP 10W-30, but since the engine is 23 years old with nearly 1,000 hours on it I decided to up the viscosity a bit to 15W-40. I chose Mobil Delvac Extreme because of it's meaty additive dosage, allowing...

All market predictions are correct ... eventually. Per CNBC guest pundits the market will skyrocket, no wait, it will crash, no wait, it will skyrocket, no wait (repeat). Everyone has a prediction but actually they don't really know. Markets are moved by the unknown, as what is known is...

I live in the Blue Ridge Mountains with woods in the back so I get lots of critters, including deer, possums, ground hogs, skunks, rabbits, raccoons, hawks, eagles, squirrels, vultures, chipmunks, foxes, snakes, field mice, dogs, cats, bears, and about 30 varieties of birds at the feeders...

Lots of possibilities as noted above. It requires a methodical process of elimination starting with the easiest approaches. I had a similar problem which turned out to be a short in the clutch, but in my case the short blew a fuse every time. Zeroed in on it and had the clutch replaced. Your...

Vacuum a car interior?? What was wrong with a whisk broom and dust pan?

Wow, you had toy rifles! We used stick-rifles in our battles: cowboys against Indians, and army against the Russians. And in pirate fights we made swords from scrap wood my father kept in the cellar. If it wasn't raining or we weren't sick we were outside playing - stick ball or roller...

Some may not find this humorous from an environmental standpoint, but it gave me a giggle. I was shopping online for some furnace filters, and after pricing them at the usual venders like Amazon and Walmart I was surprised to find them at a lower price on Chewy.com, the pet food site! Since my...

Many of the synthetics of the early & mid 70s (Mobil 1 excepted) were based entirely on esters. With that much competing polarity and depending on engine design, these oils sometimes delayed the ZDDP from establishing its protective film in newly rebuilt engines during break-in, leading to cam...

Wife does the dozen flower beds and I do the vegetables. The garlic crop is nearing maturity, and under the row cover is broccoli & cauliflower.

Congrats! The freedom is intoxication!

My room was robbed in Moscow in 1990. The hotel rooms had skeleton keys, and someone entered the room next to mine and climbed out the their window and into mine. Took my briefcase which had a couple of hundred dollars in it, two suits, and a pair of shoes. It also had my passport and visa...

Thanks, I had not heard that. But then I have been retired for 17 years so I am out of touch with toxicity classifications, and no longer formulating lubricants (except in my head).

Likewise for TPPT. I used it in a high temperature oven chain oil and ran the formulation through multiple oxidation & corrosion stability tests run 72 hours @ 425°F. All passed with flying colors, and I smelled the used oil for any sulfur odor - there was none. The formulation went...

So long as the temperatures are not too high that's not a bad combination. DIDA may be a bit thin at 3.6 cSt @ 100°C and it would need some additional additives, like anti-oxidants and corrosion inhibitors. TPPT is what I had in mind for anti-wear/EP. A POE base may provide a lifetime oil...

I agree a low viscosity may be best depending on the load and engine design, but the POEs used in jet turbine oils are not ideal for this application. The esters used in jet oils are constructed with high percentages of short chain fatty acids, mainly C5 at 40-55%, in order to meet the low...