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Re: Marine Lubrication
Fuel dilution was one of the problems that mobil 1 had with aircraft piston engines about ten years ago. They found that the oil could not handle the lead in the fuel. I am hoping that hydro or one of mobil 1 dealers will help with the story but this is what I can remember:
Mobil 1 was tested with a rental fleet. It was the low horsepower training airplanes that were run many hours everyday. Kinda like the las Vegas taxi cab test. The oil looked good and alot of people switch including the people who had the high horsepower turbo motors who were the weekend pilots. The daily drivers never had a problem with mobil1 but the high horsepower seldom use dirty burning motors began began to fail. The motors that closely resemble a carburetor boat motor. There were lawsuits and mobil 1 was pulled from the piston aircraft market. The bottom line was that the mobil 1 would not absorb or scavenge the lead in the fuel and lead sludge would build up around the rings causing engine problems. The 50 weight dino oil would absorb the fuel and carry the dirt back to the filter and the gas would burn off. Dino oil can have a lot of stuff in it and still lubricate well. Ask a amsoil dealer about adding any additives to their oil and they will tell you not to. They are afraid that the additive might break down the delicate chemistry of their oil. There are some good things with synthetic oil. hydro recommended the valovine oil treatment. I put a bottle in with my 30 and 40 weight dino oil. Zddp is good stuff. Amsoil use to be number 1 with zddp and this is why many of their oils will not meet the api spec. Too much zppd with hurt the cat converter. I also think that the zppd will disappears quickly in oil like the zincs on your boat. This is why amsoil requires you change the filter and add a quart every six months. The additives in the new quart really do more good than changing the filter. They just do not want you to know that their oil needs to refreshed every six months. Hydro is also right that the new oils are being reformulated for epa standards and will not protect your engines as well. A lot of the newer motors with the roller cam's and fuel injection can get by with the newer thinner oils. I always thought the new corvettes had mobil 1 because chev did not put an oil cooler in. It was cheaper to change the oil than add a oil cooler. I think the best choice depends on your motor and how you use your boat. I would like to hear more from people who take oil samples. I have thought about doing it. |
Re: Marine Lubrication
Fly fast, fuel dilution was why I got away from MB1 and Amsoil. I had some analysises done and at 30 hours I had too much fuel in oil. Carb 500 type motors. Decided to go to Val racing and dump it at 25 hours. Now have blowers and the fuel in oil thing is nuts.
Does anyone know what MB1's Zinc Mass% is? They do not show any Zinc in their "typical properties" report off their site. :( |
Re: Marine Lubrication
On Saturday, I mailed a 20 hour sample of Kendall 20W50 to Blackstone Labs for analysis. I'll post results as soon as I get 'em. :D
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Re: Marine Lubrication
Bglz42, that should be interesting. It is with the new formulation (Conoco) I would presume.
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Re: Marine Lubrication
Thank's Hydro,
Very Good Data. :d |
Re: Marine Lubrication
Originally Posted by FlyFast
Fuel dilution was one of the problems that mobil 1 had with aircraft piston engines about ten years ago. They found that the oil could not handle the lead in the fuel. I am hoping that hydro or one of mobil 1 dealers will help with the story but this is what I can remember:
Mobil 1 was tested with a rental fleet. It was the low horsepower training airplanes that were run many hours everyday. Kinda like the las Vegas taxi cab test. The oil looked good and alot of people switch including the people who had the high horsepower turbo motors who were the weekend pilots. The daily drivers never had a problem with mobil1 but the high horsepower seldom use dirty burning motors began began to fail. The motors that closely resemble a carburetor boat motor. There were lawsuits and mobil 1 was pulled from the piston aircraft market. The bottom line was that the mobil 1 would not absorb or scavenge the lead in the fuel and lead sludge would build up around the rings causing engine problems. The 50 weight dino oil would absorb the fuel and carry the dirt back to the filter and the gas would burn off. Dino oil can have a lot of stuff in it and still lubricate well. Ask a amsoil dealer about adding any additives to their oil and they will tell you not to. They are afraid that the additive might break down the delicate chemistry of their oil. There are some good things with synthetic oil. hydro recommended the valovine oil treatment. I put a bottle in with my 30 and 40 weight dino oil. Zddp is good stuff. Amsoil use to be number 1 with zddp and this is why many of their oils will not meet the api spec. Too much zppd with hurt the cat converter. I also think that the zppd will disappears quickly in oil like the zincs on your boat. This is why amsoil requires you change the filter and add a quart every six months. The additives in the new quart really do more good than changing the filter. They just do not want you to know that their oil needs to refreshed every six months. Hydro is also right that the new oils are being reformulated for epa standards and will not protect your engines as well. A lot of the newer motors with the roller cam's and fuel injection can get by with the newer thinner oils. I always thought the new corvettes had mobil 1 because chev did not put an oil cooler in. It was cheaper to change the oil than add a oil cooler. I think the best choice depends on your motor and how you use your boat. I would like to hear more from people who take oil samples. I have thought about doing it. As a Mobil 1 dealer I have never heard that story. Mobil has had an aviation synthetic lubricant for over 20 years. The engine oil has been for turbine driven engines though. The first generation of synthetics was call Mobil Jet Oil 254. The second generation of jet lubricants was and is called Mobil Jet Oil II. Both are great products and I have never seen any problems. We have some govt contracts that use those two products plus the Mobil HF and HFA which are low temp. hydraulic fluids. I have never heard of this Mobil 1 story. I can do some research to see what happened.. Do you know about when this happened?? |
Re: Marine Lubrication
Bglz42, that should be interesting. It is with the new formulation (Conoco) I would presume. |
Re: Marine Lubrication
Originally Posted by bob
Hydro-why do you feel 50-60 wt oil is recommended for race applications? I could Cut/paste some oil company statements regarding this but I am looking for a non biased opinion. :D
Everytime I am at a boat race I see the guys out there racing using a 50-60 wt oil...synthetic or conventional...I figure they know what they are doing. :D |
Re: Marine Lubrication
If you have a blower and have fresh oil and it smells like gasoline...some guys just change oil filters...does this work>?
It probably depends on the amount boost you are running I would imagine. High compression engines also accumulate gas in the oil...it's mostly from 'blow-by". Gas and water from reversion in the oil are scary things. Would be nice to have a sensor and gauge that detects this quickly. Play big and pay big I guess. |
Re: Marine Lubrication
Originally Posted by bglz42
Yes, Bob it is the ConocoPhilips formulation.
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