Fred I think you should add that in the large diesel engine generators and
turbines, the oil is seldom changed. Oil samples are taken at regular
intervals and tested in a lab for different contaminants and than the
technician calculates the amount of oil to be withdrawn from the sump and
new oil added. Entirely different scenario from ours.
When Mobil 1 first came out I received a the test results done on a chev 401
HP engine that had been run wide open for 100,000 miles. the honing marks
could still be seen on the cylinder walls with no percepatable wear on the
main and rod bearing etc. Try that with a petroleum based oil.
Are you worried about cost or reliability? In my case I am and it is worth
the extra $15 an oil change to use Mobil 1. I can do it myself with Mobil
one cheaper than a facility can change it with regular oil.
Engines, trannys and final drives are not cheap.
>
> don't use Synthetic Oil in the Final Drive. GM's specifications were
>written in the 70's for our Motorhomes. A lot of improvements have
>occurred since then. Best to upgrade to Synthetic in the Final Drive
>IMHO.
>
>Duane>>
>
>Duane
>
>As you will probably acknowledge, hydrocarbon-based lubes are also much
>improved from 20 years ago; however, where there is a need for relatively
>precise viscosity control as in gas turbine engines, the syn lubes outperform
>the even the state-of-the-art "standard" lubes. My experience is that the syn
>lubes are somewhat of an overkill (and relatively costly at that) in light
>duty vehicle applications.
>
>Admittedly, my bias is from an engineering and operations standpoint with very
>large (50,000 to 200,000 BHP) gas-fired turbines, pumps and compressors in
>locations ranging from Alaska to Saudi Arabia.
>
>Fred
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
turbines, the oil is seldom changed. Oil samples are taken at regular
intervals and tested in a lab for different contaminants and than the
technician calculates the amount of oil to be withdrawn from the sump and
new oil added. Entirely different scenario from ours.
When Mobil 1 first came out I received a the test results done on a chev 401
HP engine that had been run wide open for 100,000 miles. the honing marks
could still be seen on the cylinder walls with no percepatable wear on the
main and rod bearing etc. Try that with a petroleum based oil.
Are you worried about cost or reliability? In my case I am and it is worth
the extra $15 an oil change to use Mobil 1. I can do it myself with Mobil
one cheaper than a facility can change it with regular oil.
Engines, trannys and final drives are not cheap.
>
> don't use Synthetic Oil in the Final Drive. GM's specifications were
>written in the 70's for our Motorhomes. A lot of improvements have
>occurred since then. Best to upgrade to Synthetic in the Final Drive
>IMHO.
>
>Duane>>
>
>Duane
>
>As you will probably acknowledge, hydrocarbon-based lubes are also much
>improved from 20 years ago; however, where there is a need for relatively
>precise viscosity control as in gas turbine engines, the syn lubes outperform
>the even the state-of-the-art "standard" lubes. My experience is that the syn
>lubes are somewhat of an overkill (and relatively costly at that) in light
>duty vehicle applications.
>
>Admittedly, my bias is from an engineering and operations standpoint with very
>large (50,000 to 200,000 BHP) gas-fired turbines, pumps and compressors in
>locations ranging from Alaska to Saudi Arabia.
>
>Fred
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
