From: noel shelley (noel@shelley1722.freeserve.co.uk)
Date: Fri Jan 09 2004 - 12:03:27 PST
It`s me again,
Running engines on light viscosity synthetic oils is
fine if that's what the engine was designed for , lower drag ,easier
starting , better fuel economy Etc BUT put it in an engine not made to use
these oils is asking for trouble . Slightly worn oil seals that would hold
back 20-30 V oils may struggle to stop synthetics , LOOK at the cost of them
.
The biggest single difference between gas & diesel oils is the detergency
factor , and boy those multi fuels sure run sooty. The detergency is what
put simply absorbs all the soot , rubbish Etc and holds it in solution so
when you drain the oil it`s gone , not left sticking to the inside of the
oilways and everywhere else .
IF you want to see how much soot oil carries round ask anybody lucky enough
to have a centrifugal oil filter to show you what comes out , YOU won`t
believe it , a coating probably 3/8" thick and looking like hard rubber , IF
your lucky , because if there's any bearing trouble all the bits will be in
there too.
In very cold conditions don`t underestimate the effect that oil drag will
have on your ability to start the engine .
Oils have an IDEAL running temp and running too cold will not allow them to
get rid of moisture leading to sludge formation which will clog filters Etc
.
The best advice is A what the engine maker says, or, B the advice of one of
the major oil companies . An important factor is the prevailing temperature
.
BUT ANY OIL IS BETTER THAN NO OIL . Noel
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