Recent content by reynoldsmachine.hr@gmail.

The 10w40 lucas was what I was considering using.

I did some more reading. Tohatsu says the engine runs too cool with synthetic oil and due to it running too cool, it blows gasoline by rings. Sounds crazy to me. Same engine with mercury name on it calls for 25w40 conventional, but Mercury does not come out and say you can't run synthetic in...

I think I paid dealer about $12 a quart last time I bought it.

It's several years old. Well broken in. My Tohatsu dealer closed so I would have to orderTohatsu oil now.

Owners manual says that you can not run synthetic oil in this engine. Calls for 10w40 semi synthetic. Manual says synthetic oil will cause gasoline blow by on rings. Is this accurate or some marketing hype. For those not familiar this is the same power head in the 20 HP mercury. Tohatsu builds...

It looks and behaves thin, but not this thin.

Very rarely do I send oil to lab for analysis. Occasionally I will send oil from construction equipment in, but rarely light duty truck oil.

I can't guarantee no fuel contamination but I am confident there was none. I have seen fuel contamination many times over my 40 years of doing maintenance. Oil had no signs of it. No fuel smell. No fuel diluted feel. Engine it came out of has no known issues. Oil level was exactly where it...

I ran it in my Silverado 5.3 liter for 4000 miles. When I drained it, it was not very dirty. Cut the oil filter open and it looked normal. What shocked me was the apparent viscosity break down of the oil. It was as thin as water. I missed my catch pan with stream because it shot 6" past pan. I...