Thread: 1600 S1 - Whats the correct engine oil?

As stated by Harry this problem has nothing to do with oil grade, and if coming out of the rear of the engine there is no seal so look for these possible problems.
Crankcase pressure, blocked breathers, very worn engine with lots of blow pass.
Some one left the slinger off or has tried to install a seal, silicon or the like is blocking the drain back to the sump.
The sump gasket at the rear is leaking.
You may have the wrong dip stick thus oil level to high.
I have seen all of these.
In my opinion 5W 40W is way too light, OK in a TD5 but not in an engine designed 70 + years ago, I use 20W40 Lowest spec Castrol I can buy in my S1s.
Any more than 1 to 1.5L per 1000Ks in a good engine would be a worry.
I agree this may be a bit much for corrosion proofing.
Dennis

You can rest easy, the grade of oil has nothing to do with the leaks.

excess quantity is one possibility,
spirited driving another,
but most likely seals and so forth,

however old fashioned engines wern't really good at keeping oil in
so it may be that it wasn't driven much or the seller cleaned it before you drove it.

so, lets ignore the spirited driving,
all that needs to be sorted is excess quantity,
or it leaks!
mine was as clean as a whistle when I bought it,
not so after a few hundred miles under its belt,
but not alarming to me, old cars and trucks do
spill a bit overboard.
crook rings and excess crankcase pressure have something
to do with this, but it is normal for these older engines to
chuck a bit out.
if you are losing a pint in 3 hundred miles, fix the engine.

I run Penrite HPR Diesel oil 20/60 in all my Series engines and they all leave their marks on the road, some more than others. (2 x 2.25 and 1 x 1.6)
Since changing to this particular oil I have cut back on my oil usage considerably and find that engines are running cooler.
The above findings come mainly from a forward journey undertaken in a 2.25l engined vehicle from Bris-Corowa a couple of years back, running on Valvoline 20/50, and the return journey in the same vehicle (obviously) on the Penrite HPR 20/60 product 4 days later.
The return journey was the cheaper by far (oil-wise).
Both forward and return journeys took the same time (3 days), were within a week of each other, under similar climatic conditions, carried two people, towing a light camper trailer and both trips returned the same average fuel consumption 16.8 MPG.
I have no figures whatsoever to back up what percentage of my usage was accounted for as being burnt or leaked though unfortunately. Daisy is a bit worn so I would guess that most was burnt.
Regards
Glen