engine oil colour

[lele]

is it true that in a new engine the oil colour stay clean a lot more than in a used old one? why? after last trip in hot weather my bardahl oil go from clean orange to black in 2000 km..

 

[eflyguy]

A little research on the interwebs will answer your question:

".. the oil is working just the way it's supposed to, dispersing the tiny particles that can result in engine sludge and holding them in suspension in the oil itself so that they can't build up. That's why the oil appears darker, but this in no way impedes the oil from performing its normal functions of lubricating and protecting the metal surfaces inside the engine."

I have run oil for 7,000 miles and had it analyzed, the oil was still working well within required ranges, it was "dirty" but not anywhere near recommended limits. The lab suggested I try going longer! I prefer to change every 5k, however, as it's easy to remember to do it at 20k, 25k, 30k, etc. (I have several vehicles and change the oil myself)..

 

[C&C]

.........and if you're talking about the FJR, when you change oil you're changing four out of the five quarts that are in the crankcase/tranny (so you will see a quicker change to darker then if you replaced all the oil).

 

[jammess]

Does the FJR have an oil cooler with thermostat?

 

[Queensland Ken]

Does the FJR have an oil cooler with thermostat?

Yes on the cooler, no on the thermostat.

It uses a heat exchange unit incorporated with the normal coolant circuit.

But it doesn't have a dedicated "radiator"