Wednesday, Nov 14, 2012 at 17:55
Firstly start by looking at the specification required in the owners manual....there will be oil spec codes.
You are looking for an oil that meets or exceeds those oil spec codes.....forget the anything else written on the bottle or in the advertising, the oil specification is what matters.
People can argue what is meant by synthectic.....truth is it is very hard to meet the current top specs with out synthetic components
Then go and look at the three to shelf diesel spec oils
Mobil Devlac,
Caltex Dello and Shell rimular......these are the top spec oils commonly available in their class.........varified by independent testing and are used in huge volume in the heavy transport industry........they are all mixed fleet, multispec oils, they are intended to work
well in both diesel and petrol vehicles.
Pick a brand......they are all good oils and there is very little to seperate them in performance...all 3 are marketed world wide and guaranteed to meet spec.
Then select the particular oil required....they all have slightly different grades to meet specific spec...the upper spec oils meet the lower specs.
so if we talk
Caltex Dello
The Dello 400 multigrade 15w40 is a JASO DH1 specfied oil and is right for all but the latest diesels and the very latest funky petrol engines. This is what I use in everything I own, from my diesel hilux to my ride on mower.
It meets spec on many of the newer engines but the Dello LE 15W40 or 10W40, is a JASO DH2 spc oil and better designed better designed for moddern common rail diesels and with diesel particulate filters
The situation is similar in the other brands.
Why run these oils.......because they are heavy duty oils designed and marketed to the heavy transport industry and they are very good oils.
AND they can be baught a hell of a lot chepaer than retail oils that are often inferiour.
none of the 3 are marketed on the basis that they are synthetic.....but they all contain synthetic components, they are marketed on performance to people who have very large sums invested in their engines and do a hell of a lot of Km
AND...they are a hell of a lot cheaper if you buy them in the right place..all of them can be had for arround $100 for 20 liter drum, if you buy in the right place....often a great deal less..simply because they are consumed in such huge volume...AND there is no retail BS involved.
I pay arround $85 for a 20l of dello multigrade, from a
caltex fuel depot that mostly only deals with trucks.., stepping up a grade may cost you arround $5 or $10 a drum.
While I am at it...buy ya filters at a diesel spares
shop...you will pay less for a better filter.
One of the biggest revalations in my automotive life was changing from overpriced retail oils to top quality diesel spec oils
cheers
AnswerID:
498524
Follow Up By: Member - Howard (ACT) - Wednesday, Nov 14, 2012 at 19:41
Wednesday, Nov 14, 2012 at 19:41
the bantam,
unfortunately the delo400 multigrade at either 15w40 or 10w40 does not meet toyota spec of 5w30 viscosity range.
i wish i was back buying RX super in 20 litre drums like 20 years ago but thats the difference between a 2H clunker and and a VDJ79 common rail motor which unfortunately is a "later diesel."
there is a lot of discussion on this on LCOOL site.
cheers
Howard
FollowupID:
774498
Follow Up By: The Bantam - Wednesday, Nov 14, 2012 at 20:48
Wednesday, Nov 14, 2012 at 20:48
Is that a single oil spec of have you looked at the little diagram in the front of your toyota manual......generally there will be a selection of oils for a range of situations.
BTW while RX super is a respectable oil it does not spec up anywhere near the Dello LE or the paralell products from the other two.
and Delo multigrade and Dello LE are different oils.
Any body got the little oil spec diagrame from the front of their manual
there should be an oil spec rosette and a temperature application graph.
cheers
FollowupID:
774505
Follow Up By: craigandej - Thursday, Nov 15, 2012 at 10:52
Thursday, Nov 15, 2012 at 10:52
To quote the manual......
"If you use SAE 10W-30 or a higher viscosity engine oil in extremely low temperatures, the engine may become difficult to start, so SAE 5W-30 engine oil is recommended."
This hardly seems relevant to Oz unless in the snowys on a bad day with the mother in law along.
FollowupID:
774536
Follow Up By: The Bantam - Thursday, Nov 15, 2012 at 11:43
Thursday, Nov 15, 2012 at 11:43
So often we see oil recommendations bassed on temperatures below freezing....Um not a problem for most of us.
remember 5W30 is only a single viscosity point from 10W40 in each part of the specification.
The other question is..is this oils spec for the benifit of the engine or required to meet some environmental requirement..for example
the 5W may allow the engine to make less emmissions when cold.
BTW...what are the oil spec codes.
is there an API or JASO oil spec code.
So many people get preoccupied with viscosity and fail to look for the spec codes.
In retail, a lost of the discussion is on viscosity, the commercial oils there is mor discussion surrounding other performance factors and compliance to the specs.
After all there may be little of no difference in viscosity between two oils seperated by a single viscosity point
cheers
FollowupID:
774537