As far as I am concerned there's every good reason to refresh the oil and filter on a regular basis
... just need to make sure I have all the necessary stuff at hand to do it properly.
I'm planning to drop the oil out, clean any sediment out of pan, replace pan using original gasket and fill with oil; then undo the return pipe from the cooler and, with engine running idling, pump oil from cooler into a container while pumping fresh oil into pan using one of those centrifugal pumps on the end of a cordless drill, until the fresh oil appears from the cooler pipe (about 5L) . I'll then switch off engine and drop oil out of pan as before, remove pan again and then replace the filter and replace pan with new gasket. Then fill pan with new oil and top off level as per RAVE instructions.
The existing filter is at optimum filtering capacity just before it's replaced with a new one..hence the order in which oil/filter are replaced as above...
Good luck with yours...Oh! for a big shed with a 4 post lift!
MY99 RR P38 HSE 4.6 (Thor) gone (to Tasmania)
2020 Subaru Impreza S ('SWMBO's Express' )
2023 Ineos Grenadier Trialmaster (diesel)
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