Engine oil 2.5n/a ex mil diesel

simba1 · Apr 19, 2020

Hi will a 5w 30 semi synthetic oil be ok for a oil change ,as i have normally used mineral oil and have acquired some synthetic oil cheap GM dexos 1 5w 30 could it do any harm?
John.

Turboman · Apr 19, 2020

simba1 said:
Hi will a 5w 30 semi synthetic oil be ok for a oil change ,as i have normally used mineral oil and have acquired some synthetic oil cheap GM dexos 1 5w 30 could it do any harm?
John.

Quite likely it will do damage.
That sort of engine is designed for mineral oil.
Synthetic oil can cause the bores to glaze, gases to leak past the pistons, eventual damage to the pistons.
And is also too thin for the lubrication system of that engine.

Rodeo Joe · Apr 19, 2020

I use 15/40 or 20/50 (or a mixture of them both depending how smokey things are getting).
Definitely has to be mineral oil.

Rodeo Joe · Apr 19, 2020

Oh and there is a saying that any oil is better than no oil (but possibly not for long!)

simba1 · Apr 19, 2020

Ok thanks guys will stick to mineral.

Huddy84 · Apr 20, 2020

Plus it’ll leak out much faster...

Henry_b · Apr 20, 2020

You'd be better off filling the sump with used cooking oil.

Keep to mineral

samc88 · Apr 20, 2020

5/30 is too thin,15/40 is preferable or 15/20 if the engines worn

kermit_rr · Apr 20, 2020

samc88 said:
5/30 is too thin,15/40 is preferable or 15/20 if the engines worn

Think you mean 20/50

samc88 · Apr 30, 2020

kermit_rr said:
Think you mean 20/50

Yes that one, thanks didn't spot that one

Engine oil 2.5n/a ex mil diesel

simba1

Member

Turboman

Mab An Gov

Rodeo Joe

Well-Known Member

Rodeo Joe

Well-Known Member

simba1

Member

Huddy84

Well-Known Member

Henry_b

Think outside, no box required.

samc88

Drivels spiritual representative

kermit_rr

Very

samc88

Drivels spiritual representative

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