Probably discussed lots, however search function didn't find anything.
Ok, coming around to my first service on a mid 90's Buhk DV24 with unknown hours, however thought not too many hours as current oil is still remarkably clean after a year and maybe 100 or so hours... not BLACK, like all other diesels I've ever had.
Manual says 15w-40, or SAE 30, with a service CC, or CD under certain conditions.
So, CC and CD are obsolete measurements now days for oils, and with so many oil types out there, wondering what to choose. What would be an equivalent to CC or CD?
Should I stay with a basic mineral oil, in either 15w-40, or a SAE30 which Repco advertises SAE30 for lawnmowers??? Or splash out with a semi/full synthetic super oil?
i'm also going to use the same oil to change the gearbox oil, manual has same spec's listed which is handy.
Heard rumors not to put anything semi/full synthetic into older motors, nor gearboxes( especially if it has clutch plates... motor bikes, guess the old BV-7 gearbox doesn't have clutch plates). Heard from a old diesel mechanic to get the worst crappy oil possible for older diesels?.?
Any advice or feedback? What are others using in there Bukh's
Also any common places to get all filters? Oil/Fuel? Found a Truck place in Botony that holds most I need, though my current Volvo Penta Primary fuel filter cross references to 2 different types of Fleetguard filters FF167, and FF167A, from what I can see slightly different measurements...by 0.2mm, and different bottom size, however it empties into a bowl, so not sure it matters...?? Current Volvo Penta primary filter part was 3581078-7, however there is also a 3581078 when googling around..
Definitely not synthetic. Mono 30 as the first choice but 15w-40 is much easier to find. Use the cheapest you can find and change the oil twice a year regardless of hours. Change the filter every second change if you like. 4 litres should cost about $20. I use Baldwin filters on my Volvo and they are equivalent to Fleetmaster.
Select to expand quotelydia said..
Castrol mono 30
although might have to buy 20 litres
Is SAE 30 the same as Mono 30?
Google doesn't help
Select to expand quoteCabron said..lydia said..
Castrol mono 30
although might have to buy 20 litres
Is SAE 30 the same as Mono 30?
Google doesn't help
Yes.
For older design engines stick to mineral oil and change it every 6 months/5,000km/100hr. I'd go with Valvoline Super Diesel,
www.supercheapauto.com.au/p/valvoline-valvoline-super-diesel-engine-oil---15w-40-10-litre/17071.html
Select to expand quoteHarb said..
For older design engines stick to mineral oil and change it every 6 months/5,000km/100hr. I'd go with Valvoline Super Diesel,
www.supercheapauto.com.au/p/valvoline-valvoline-super-diesel-engine-oil---15w-40-10-litre/17071.html
I run the super diesel in the land based engines.
also seems very good.
Castrol mono 30 can be hard to get so if you find some buy a lot.
Select to expand quotelydia said..Harb said..
For older design engines stick to mineral oil and change it every 6 months/5,000km/100hr. I'd go with Valvoline Super Diesel,
www.supercheapauto.com.au/p/valvoline-valvoline-super-diesel-engine-oil---15w-40-10-litre/17071.html
I run the super diesel in the land based engines.
also seems very good.
Castrol mono 30 can be hard to get so if you find some buy a lot.
I only ever used land based oil in everything from boats to buses to 4x4s and as long as I don't mix it with salt water it works just as good as the "marine" oils. 
Sorry I was not making a distinction between water based and land based simply saying that the super diesel seems to be a good product and that I run it the diesels I use on land which of tend to be newer engines.
For the old gardner and the straight six fords there is only one choice.
oil filter fleet guard. LF 3874 I recorded for my Bukh 28
old style 30/40 oil from super cheap
oil filter fleet guard. LF 3874 I recorded for my Bukh 28
old style 30/40 oil from super cheap
I used mono 30 in my 10 hp Bukh and I still use it in my new Beta 14 hp. I get in a 5ltr can from Auto One.
I generally avoid Yanmar branded stuff and buy much cheaper equivalents where possible. Except for oil - their W30 diesel oil is quite reasonably priced in 5 litre containers.
Shell Rimula 15W-40, I have found that it maintains pressure really well, definitely better than the cheaper oils that I have tried.
Any oil but especially diesel oil should not look clean after use. It should be cleaning the engine as it is used and holding the impurities in suspension in the oil.
Clean oil means you have a problem with the oil being used.
Select to expand quoteMorningBird said..
Any oil but especially diesel oil should not look clean after use. It should be cleaning the engine as it is used and holding the impurities in suspension in the oil.
Clean oil means you have a problem with the oil being used.
define clean, never seen oil get cleaner after use. sounds like bs for having dirty engine oil.
Select to expand quoteJolene said..MorningBird said..
Any oil but especially diesel oil should not look clean after use. It should be cleaning the engine as it is used and holding the impurities in suspension in the oil.
Clean oil means you have a problem with the oil being used.
define clean, never seen oil get cleaner after use. sounds like bs for having dirty engine oil.
No Morningbird is correct. The oil will discolour almost immediately. Oil never wears out, it just gets dirty and this is especially so with diesel engines. With our type of boat engines, I would always suggest changing the oil at least twice a year regardless of the hours.
I have never seen oil stay clean, Oil that comes straight out the container can be considered dirty as it could be cleaned further. The condition of the engine will determine how quick the oil gets contaminated. To use the amount of dirt you have in the oil as a guide to having the right oil is BS.
The better the health of the engine and the better the quality of parts in the engine,, the oil will stay cleaner for longer
Select to expand quotelydia said..
Castrol mono 30
although might have to buy 20 litres
All the Briggs & Stratton engines from mowers to generators use SAE 30 so not hard to find at outdoor equipment shops in small and large sizes.
Select to expand quoteJolene said..
I have never seen oil stay clean, Oil that comes straight out the container can be considered dirty as it could be cleaned further. The condition of the engine will determine how quick the oil gets contaminated. To use the amount of dirt you have in the oil as a guide to having the right oil is BS.
The better the health of the engine and the better the quality of parts in the engine,, the oil will stay cleaner for longer
Every diesel (land or sea) I've ever had the oil was BLACK almost instantly, until this boat, a 25-30year old Buhk(changed somewhere in the 90's) the oil was like new when I checked on purchase, checked again after a couple dozen hours... still super clean, 1 year on, maybe 80-90 hours later, multiple checked, level on dip stick has moved about 1/2mm, never topped up, and oil has only just very slightly discoloured, not enough to leave a stain on your hand. Was worried at first thinking it wasn't getting pumped around, however after replacing oil pressure switch, new temp gauge... doesn't get hot or ever low oil pressure ...
Either the donk has almost no hours on it, or it's just a super clean running engine.
Will be interested to see all the oil once I suck it all out..
All good I guess
Had 50 hp ingersol rand out of the box in a machine and it was a bugger to check the oil, because it was so clean on the stick. The Nissan engine in my boat starts to get some colour not long before service is due and it has 1800 hrs on the clock. I've got a theory that it depends on how well the old oil is drained, I change the oil cold and it would also depend on the design of the engine as to the ability of the oil to not pool anywhere and drain to the sump.
Select to expand quotewoko said..
Had 50 hp ingersol rand out of the box in a machine and it was a bugger to check the oil, because it was so clean on the stick. The Nissan engine in my boat starts to get some colour not long before service is due and it has 1800 hrs on the clock. I've got a theory that it depends on how well the old oil is drained, I change the oil cold and it would also depend on the design of the engine as to the ability of the oil to not pool anywhere and drain to the sump.
Had the same problem with another motor, oil was always so clean it was hard to see on the dip stick and yeah, like you said, if you leave behind old oil it soon darkens the new. Engine castings design can play a part.
