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which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 7:30 am
by andyb36
as the title says,,, which one?
my Q8 oil guy can only get me 10w 30 in 208 ltr barrels lol a little too much
he can get me 10w 40 in smaller drums
or do i get the normal 15w 40
need a quick responce on what others put in or dont you go into it that deep and just let the garage put whatever in ??
got 96,000 kms on clock
thanks
andy
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 7:45 am
by maxheadroom
Been running 10 40 for two years and over 26K miles

Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 10:38 am
by Trouble at t'Mill
I used 10/40 last change same as Max.
10/30 is the 'recommended' viscosity, but 10/40 should be perfectly ok.
Imo, 15/40 is a tad too thick, and I'd personally avoid using it (unless your engine is particularly high mileage?).
Use a decent quality oil designed for turbo'd diesels.
I can get Millers high-synth Turbo-Diesel oil from my local Factors for around £17/5L which strikes me as being pretty darn good. No point using 'cheap' stuff at that price...
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 11:51 am
by andyb36

mine should be free from my Q8 oil supply guy
told him 7 ltrs
Q8 is kuwait petroleum
they refine for other so called companies that put their label on it
andy
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 12:33 pm
by scanner
Trouble at t'Mill wrote:I used 10/40 last change same as Max.
10/30 is the 'recommended' viscosity, but 10/40 should be perfectly ok.
Imo, 15/40 is a tad too thick, and I'd personally avoid using it (unless your engine is particularly high mileage?).
Use a decent quality oil designed for turbo'd diesels.
I can get Millers high-synth Turbo-Diesel oil from my local Factors for around £17/5L which strikes me as being pretty darn good. No point using 'cheap' stuff at that price...
I thought I read it was 5W/30 somewhere?
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 2:44 pm
by mikeonb4c
scanner wrote:Trouble at t'Mill wrote:I used 10/40 last change same as Max.
10/30 is the 'recommended' viscosity, but 10/40 should be perfectly ok.
Imo, 15/40 is a tad too thick, and I'd personally avoid using it (unless your engine is particularly high mileage?).
Use a decent quality oil designed for turbo'd diesels.
I can get Millers high-synth Turbo-Diesel oil from my local Factors for around £17/5L which strikes me as being pretty darn good. No point using 'cheap' stuff at that price...
I thought I read it was 5W/30 somewhere?
I think this is what I use, scanner as I do a lot of short runs and prefer to know that oil is flowing freely around the system ASAP.
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 5:31 pm
by missfixit70
I'm on 5w 30 too, a decision that was reached after reading up on here, factsheets & other sources, but don't ask me to explain, as I'm b***ered if I can remember why

Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 7:01 pm
by dreamwarrioruk
im running 5 30, i found that the fuel comsumption went up when i ran a thicker oil, that was when we first got the bongo and i was monitoring the fuel costs.
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 9:49 pm
by Trouble at t'Mill
Clearly the Bongo is a tolerant beast!
5W 30 is pretty thin, and would be ideal for colder climes and, I guess, short runs as mentioned above. Has anyone using this grade noticed if the oil consumption has gone up?
I'd be very surprised indeed if using 10W 30 or 40 oil caused a significant increase in fuel consumption over 5W.
For normal driving and/or motorway runs, I'd rather stick with 10W.
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Wed Mar 04, 2009 10:55 pm
by scanner
Trouble at t'Mill wrote:Clearly the Bongo is a tolerant beast!
5W 30 is pretty thin, and would be ideal for colder climes and, I guess, short runs as mentioned above. Has anyone using this grade noticed if the oil consumption has gone up?
I'd be very surprised indeed if using 10W 30 or 40 oil caused a significant increase in fuel consumption over 5W.
For normal driving and/or motorway runs, I'd rather stick with 10W.
You need to understand what those numbers mean.
The 5 or 10 does not apply when warmed up as that is the cold viscosity and thus shows how the oil performs when cold.
The 30 or 40 is the hot viscosity and shows how the oil performs when at working temperature - therefore a 5W/30 and a 10W/30 will both have the same viscosity in "normal driving and/or motorway runs" but a 5W/40 or 10W/40 would be "thicker" then.
The 5W will (as Mike says) impart less drag on the engine (and thus help make starting easier from cold) and circulate quicker after a cold start and thus protect the engine sooner.
You never "drive" on a 5W or 10W oil only start on it.
You "drive" on the 30 or 40 bit.
http://www.imoc.co.uk/forums/kb.php?mode=article&k=65
http://theserviceadvisor.com/Viscosity.shtml
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Thu Mar 05, 2009 1:23 am
by The Great Pretender
Well expained scanner, but the ABC bit matters to.
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Thu Mar 05, 2009 1:36 am
by scanner
The Great Pretender wrote:Well expained scanner, but the ABC bit matters to.
I think just hot and cold will do for a start (sorry about the pun)

Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Thu Mar 05, 2009 11:09 am
by Trouble at t'Mill
Cheers, Scanner - I understand.
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Thu Mar 05, 2009 2:11 pm
by bigdaddycain
I use 10/40 weight semi synth.
Re: which oil 10w 30 or 10w 40 or 15w 40
Posted: Mon Apr 13, 2009 12:54 pm
by peanutcrusher
can you get 5w 40 oil and if so would it be a better chose.