G'day All
Was just wondering, my user manual ('97 Rodeo Turbo Diesel) states to use sae 30 or 15w-40 oil for in the sump. Looking yesterday and there was a ten litre penrite oil, but it was 10w-50 (i think).
On the back it said it was suitable replacement for 15w-40, however thought i'd put t to the guys in the know whether it would be ok or not?
I have been looking into the diesel oil thing myself for the new truck.
penrite have 3 oils in that range.
Diesel 5
Diesel 15
and
Diesel
Diesel is a 20w60..intended for older style engines and hot conditions.
Diesel 5 is a 5w40... intended for cold conditions of engines that require a thin oil
diesel 15 is a 15w50 and is intended for small diesels... I recon that one is the go.
As I understand it and this is putting it crudely......the low figure indicates the cold flow of the oil..( start up and cold conditions) the large figure indicates the high temperature capacity.
In small modern small engines the clearances are tighter and a lighter oil is chosen to improve economy ( among other things).
The low figure is the one to worry about... if the high figure is a bit higher........thats fine.
A wider viscosity range is good.
Not that selecting either of the others would be a major problem in any way.
check out the penrite site...or..if its realy a worry...call their help line.
OH... lots of people carry diesel 15 in 10's and 20's....so look arround for prices...don't forget the diesel parts suppliers either.
cheers
Its the details, those little details, that make the difference.
A couple of links to explain the differences.
http://auto.howstuffworks.com/fuel-e...estion1641.htm
http://www.upmpg.com/tech_articles/m...ity/index.html
Just be careful though as if the last number gets too high and the first number too low you might find that there is a breakdown of the viscosity rating after a while. ie your low number will get higher (no troubles on QLD) but your high number will get lower (troubles in QLD).
GM actually don't recommend using oils with over 30 difference between the 2 numbers and is why they would have specified the 15W-40 oil.
Don't forget to check the API service rating of the oil...the letters in front, as they are more important then the numbers in my books.
But if you change your oil regularly nothing wrong with the Penrite 15 but would try and get something closer to the 15w-40
I intend on living for-ever....so far so good
I will go against portions of Oldboots advice in places in my reply..sorry.
The days of thicker oils are better have disappeared, the best oils are thinner ones...with caveats, if your engine is not known to sheer in any way or it is flogged out or you will almost never miss a oil change.
The thicker the oil the higher the insitu bearing temperatures measured microscopicly, the film strength is no better between surfaces but it takes extra mechanical pressure to squeeze the heavier stuff down thus increasing insutu temperatures and potential damage - makes for more hostile bearing environment....last thing a toyota diesel needs I understand.
The first number on the bottle has no bearing in wider Australia contrary to populart belief as it is a number dirived for and with bench test procedures that relys on northern hemisphere levels of environemntal cold....once the ambient temperature become warmer than say -5degc the number becomes almost irrelvent to the point that at +15degc a 10wt can actually be thinner on startup than a 0 wt.
For an oil to get to a 50wt it need bucket loads of viscosity improver, these are laboratory made long chain polymers which have NO part in lubrication, hence the one most important rule of thumb in choosing an oil is to look for the gap between the first number and the last a 0wt-50 for instance will be a flimsy oil due to the lack of actual oil and thus it's sheer stability, a singular 30wt will be entirely sheer stable due to the lack of viscosity improver added.
bottom line is no log haul truck/fleet will willingly choose a brand like penrite for their fills, our small diesle run by identical rules those truck engines do, big truck users will choose an industry recognised HD diesell oil every single time, all this means is it has the PROVEN abilty to retain soot, combat water, sheer, attacks on its anti corrosion ability and in general a sophisticated additve pack...fully a shelf or two higher than popular vehicle diesel oils.
I don't really care what brand oil a person uses, here are a few that are generally recognise world wide as the best or near the best diesel oils available. There are about another another 6 or so very well respected ones, Penrite to my knowledge is not even on the first 12-15 or so, I think only a couple of the marketed at the general public oils will be on the list unless of the more boutique variety.
Dello 400
Delvac 15-40
Rimula
cheers fnq
I did say putting it crudely.
As far as being recognised world wide....most of those would be manufacturerd by large oil companies that market world wide.
Considedring Penrite, is pretty well exclisuvly Australian.. I would not expect it to have a "world wide reputation"
and most of the trucking fleets will have bulk fuel accounts with a major oil company... of course they will be using lubricants from a major oil company.
I posted details of penrite because A/ I like penrite and B/ that was the brand mentioend in the original post.
Lots of the "top brand " diesel oils will not be easily available to the general public at a place where they will purchase, in the quantities they want to purchase.... or at a price they want to pay.
All the major fuel companies will have a respectable diesel oil......... of course
As for the GM recomendations.........how often do they change their recomendations or lube specifications...those recomendations may be bassed on 20 year old oil technology.
And almost every oil bottle I have ever read says someting about "exceeding" a string of oil specifications.
The bottom line and the single most important message with these small diesels is to change your oil regularly.. whatever you use
cheers
Its the details, those little details, that make the difference.
I second the Delo 400.
Great stuff, buy it from your local Caltex depot by the 20lt drum, great value.
And yes, change every 5000k's, oil is cheap compared to fixing engines!
Cheers.
Use a 15/40 in any of the top brands. Can't go wrong with that.
Whats your thoughts on synthetic verses mineral oils?
Go with what your engine manufacturer recommends spec-wise, ie a high-tech late model euro diesel in a passenger car or soft-roader may specify synthetic oil, whereas my old 1hz is fine on 'dino', non-synthetic mineral oil.
Horses for courses, I think.
Cheers.
So I called penrite and had a nice chat with the loverly Fiona, asked some hard questions about a number of their oils...and so forth.
thier HPR diesel range is intended as a light duty oil... yes "diesel 15" it is appropriate for most 3 litre diesels..... but it isn't their best oil for the purpose... and it should not be run in petrol cars with a catalytic converter......too much potasium ( from memory)
The oil I will probaly end up running is Diesel LA... which is a 15w40.. and it is in their heavy truck range........ yess correct it is a better base oil than the 15w50/60 oils and it does not depend on viscosity modifiers as much.
It is also suitable as a mixed fleet oil, in that it is suitable to run in petrol engines with cat converters...which is good because I will run it in all my vehicles......... for got to ask about DPFs though.
I note that they have 20's of Diesel 15 down at QDS, but they have much more stock of Diesel LA.
It is available in 20 litre drums and larger quantities... have not priced it yet......diesel15 runs at about $130 for a 20l.
cheers
Its the details, those little details, that make the difference.
Excellent! This time i ended up just going with Valvoline super truck 15w-40, have run it in dads for a while (same engine - 2.8lt turbo diesel) so just went the same. Next time around may look at a different brand, or as FNQ said one of the better truck oils.
Yeah the diesel 15 is the pick of that bunch you are right, i think it is the one penrite specifies for the GU TD 4.2 and has a small % of group 3 called/marketed as a synthetic which does on the surface it worthy of the price.
The LA that would be a CG? MMmmm its only still available because people keep believing their engines are stuck in the technology time of the day it was designed and therefore better modern oils can never suit it.
It is surprising how many times 5 years ago I was told dello 400 will ruin my my upper valve train based solely upon the crumby high calcium etc oil spec it was sold under so must forever be run with!, only this last couple of years has the tide started to change and people are reconsigning what a global HDEO oil actually is and why this is to their advantage.
cheers fnq
just been down to QDS to pick up some bits...I was mistaken they don't stock Diesel LA... they have diesel 15... and buckets of castrol RX super.
They quoted me arround $160 for a 20 of LA, and arround $130 for D15.
They have the RX for arround $100 as do supercheap and others.
Never been real keen on castrol oils for some reason....I seem to think BP now own both Castrol and Valvoline... that puts me off.
any way... lets start again
there seem to be a line up of oils that spec up pretty much the same..as a diesel / mixed fleet oil.
Mobil Delvac 15w40
shell rimular
caltex dello 400 15w40
valvoline supertruck 15w40
Castrol RX super...........................are these two the same oil??
and of course
penrite diesel LA 15w40
Anybody got pro's and cons of each
Big brother is a rimular fan and he does plenty of hard miles..... and it may possibly be the most popular diesel oil in the country.
what about cost comparison.
so far $100 to $160...per 20 price is a consideration.
cheers
Its the details, those little details, that make the difference.
As i already said dad seems to like the valvoline supertruck 15w40. Cost is normally $62 for 10Lt, never bought it in a 20Lt but would think about $120ish??
Has done well over 100k using it, never had a problem. Does oil and filter every 5000km of course.
Im thinking from my next change onwards ill be probably going for the dello 400, heard pretty good reports about it.
oldboot there is also a motorcraft HDEO diesel oil that is top shelf.
it's pretty well accepted the order for the ones in your list and based on oil analysis not guesswork is:
Delvac
Dello
Rimula
With the motor craft quite possibly filling a spot above the Dello somewhere.
I just buy the Dello and be done with it, the price and the understanding that if there is a better oil out there there is no way i will ever know...it's that good, still i did buy one 20l of delvac a while ago but i am over paying that much for such a small potential gain.
The dello 400 CI (not sure on the CJ) has a lovely smattering of molly almost as a gift for the price it seems....as a result move aside shaffers, penzoil and amsol HDEOs as a waste of money.
cheers fnq
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