ukmgranger · Aug 23, 2012

Hi all,

Just found an unused Castrol SLX 'LongLife III' 5w-30 in the garage.

Can I use this in my 300TDi, or Should I stop being tight and get something proper?

Jongould · Aug 23, 2012

It wouldnt do no harm but it may be a bit thin, personally I would go 10-40 or 15-40 depenmding on mileage. As I say it will work and wont cause any problems except the oil pressure may drop when its warmed up...

ukmgranger · Aug 23, 2012

Jongould said:
It wouldnt do no harm but it may be a bit thin, personally I would go 10-40 or 15-40 depenmding on mileage. As I say it will work and wont cause any problems except the oil pressure may drop when its warmed up...

Thanks for the quick reply. I don't quite understand the milage thing though?!?

Mine has done 98k (P reg) 10-40 or 15-40?

Jongould · Aug 23, 2012

ukmgranger said:
Thanks for the quick reply. I don't quite understand the milage thing though?!?

Mine has done 98k (P reg) 10-40 or 15-40?

The older they get the more worn they get, you will go up to a thicker oil as it gets more worn... 10/40 will be fine for yours....

Cutty Dyer · Aug 23, 2012

ukmgranger said:
Thanks for the quick reply. I don't quite understand the milage thing though?!?

Mine has done 98k (P reg) 10-40 or 15-40?

If you're consuming/burning lots of semi-synthetic 10-40, it's worth switching to a mineral 15-40. The thicker mineral oil will not escape the rings so easily so will not have to be topped up so often (and its cheaper).

ukmgranger

New Member

Jongould

New Member

ukmgranger

New Member

Jongould

New Member

Cutty Dyer

Active Member

Similar threads