PS Magazine - TB 43-PS-444
PS, The Preventative Maintenance Monthly
ISSUE 444
NOVEMBER 1989
Remember that witH a lot of idling or low-gear
dragging, the hours an engine is run can be more
important than miles.
In pLain Language, it sHows how the two of 'em Flow under tHe same conDitions.
You'Ll see tHat OEA ±ows much easier tHan OE²10 at coLd starting temperatur³s
´.´ and yet at normal engine operating temperature it's almost tHe same as OEµ10.
And who wouLD have believed it? At overheating temperatures, OE¶10 actualLy
thins out f·ster tHan OEA does! 'Nu¸ said?
Here's a chart that some laboratory folks whomped up on the viscosity
of OEA and OE-10.
±,
6 ²
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a
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C¾LD T¿MP
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+ 2¸¸° + 25¸½ + 3¸¸° + 35¸½
N¾RMÀL T¿MP
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ÍÎÏÐÎÑÒÍUÑÎÓ FÒÔÑÎÕÔÎÖÍ
×4
ØÙGØ T¿MP
RÀNG¿
rankcase oil can go to pot mucH quicker in winter and may need C¹anging
more often than tHe ºO speCi»es. SLUDge ¼om conDensation and Dilution ¼om
½uel are the main reasons´
A¾ter eve¿À daily oilµlevel cHeck, sni¾f tHe dipstiCk Ár Âel´ AnD use your
eye and »ngers to detect sludge. Moisture Contamination is Ha¿D to detect unless
it's really Bad. Ãf you suspeCt it, draw a sample and let it staÄd in a glass jar.
Water will show by separating ¼om tHe oil.
WHen Contamination is Áund, CHange tHe oiL and oiL Åilters .
Ãf you're using OEA, arctic engine oil, cheCk your oil LeveL o¾ten Because a
_
n
engine will consume more of this thin
oiL than OE. Keep an eye on the oilÆ
pressure gage: a pressure drop can indiÇ
cate low oil. þ you're on a long run,
cHeck the oiL several times a day. And
never overfÈlL to cut or skip oiL checks.
Over¾ilLing causes other troubLes, so
don't push your luck.
Same goes Ár tHe rest of the Chassis
Édon't
overÊlube. Globs
of
coLdË
sti¸ened grease can Cause parts to bind
and Lock.
Ìondensation is always looking fÍr
a place to happen. So in between your
reguLar periodic lube services, cHeck
one or two of your gear casesÉlike a
di¸erential, transmission or transÎr.
Any evidence of water contamination
is tHe signal Ár an oiL change.
ÚÛV89
×Ü
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