Which method of changing oil is better?

Greenman

The guy in the past used to change by loosening the bolt under the sump and let the oil flow out.

My new guy puts a rod into the place where you check your oil and sucks the oil out.

My question is, is one method better than the other or are they much of a muchness?

Thanks in advance JD!!!!!

colm_mcm

I would have thought the old fashioned way would be better as it would flush out any gunk in the bottom of the sump. I may be wrong though.

JohnCleary

Definately the old fashioned way of draining from the sump is better, you get rid of all the oil

I have to use the dip-stick method on my boat, only gets about 3/4 the oil out

mukki

you might want to shorten the service interval a small bit if your using the dip thing

crosstownk

colm_mcm wrote:

I would have thought the old fashioned way would be better as it would flush out any gunk in the bottom of the sump. I may be wrong though.

I totally agree. Also, a lot of cars have a 'magnetic' sump bung which attracts fine particles of metal. Its a good idea to remove the bung and clean it once in a while. A 'Dalek" will suck the oil out, but is less likely to suck out oil that has gone 'sludgey' or any metal shavings on the bung.

If the manufacturer thought that sucking was sufficient then they would have ommited the sump bung.......................

Mr Magnolia

crosstownk wrote:

I totally agree. Also, a lot of cars have a 'magnetic' sump bung which attracts fine particles of metal. Its a good idea to remove the bung and clean it once in a while. A 'Dalek" will suck the oil out, but is less likely to suck out oil that has gone 'sludgey' or any metal shavings on the bung.

If the manufacturer thought that sucking was sufficient then they would have ommited the sump bung.......................

Ya, I throw an engine flush in every couple of services too.

Greenman

Thanks to all who replied, I might ask him to do the old method or discuss it with him.

Thanks JD!!!!

Seth Brundle

don't discuss it - tell him! If he continues to suggest the suction yoke then walk away as he then knows sweet fa about engines!