Isuzu Trooper Owners Club UK™

trooper93 · Newbie Joined: 02 Aug 2007 Posts: 4 Location: yorkshire

Hi all,

i have a 93 trooper duty 3.1td, and dont know what oil i should put in it castrol suggests 10w40, i have some 15w40 mineral i use on my transit spare and am tempted but in some workshop literature i have it says dont use straight mineral oil, and dont use non-detergent oil, and from what other people have said on here oil is going to make significant difference to performance, any ideas or advice anyone????

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Philp · Posted: Sun Aug 26, 2007 16:43 Post subject:

I don't think it makes much difference tbh on a 3.1 itsd only the 3.OL thats sensitiveto grade. I use Halfords own brand semi-synth 10W40. Theres an oil chart in the handbook that gives the range of oils you can use. I would guess 15W40 will be OK but it may be a bit thick in winter when the engine is cold.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

Peej · Posted: Sun Aug 26, 2007 16:44 Post subject:

The big problems with oil occur on the 3.0 td, which must use 5/30. The 3.1 is not so fussy, most factors will recommend 10/40 part synthetic, which is what I use, 15/40 is fine. I personally use a reasonable quality oil, because of the turbo and change it regularly. If you have a search of the site there will be plenty of opinions.
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Hard1 · Posted: Sun Aug 26, 2007 23:17 Post subject:

Whatever you use - use a type suitable for older diesels, mineral or semi synthetic. I have used 10-40 semi but for some reason I've gone to 15-40. No difference in pressure, but as Philp points out as it's still summer and cranking might be tough in winter! Fully synthetic is a tad too slippery for our "loose tolerances" and will result in increased fuel consumption. Oil not formulated specifically for diesel will not be able to hold particles in suspension as efficiciently as one that is....

And at 3,000 mile oil changes, who wants to bung in Mobil 1 anyway? Laughing

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Philp · Posted: Mon Aug 27, 2007 9:22 Post subject:

My thoughts exactly, with such a short service interval I'm not paying for Castrol etc. Its much more important to use a reasonable oil and keep to the service intervals.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

Peej · Posted: Mon Aug 27, 2007 9:51 Post subject:

Tourist · *** Joined: 23 Jan 2007 Posts: 136 Location: Malaysia

No offense but I will give a different views.

Probably partly out of pride, the Japanese and European insisted that their engines are different and requires different types of engine oil as those categorized by American Petroleum Institute API. And they give technical reasons as to why their engines are different and have their own certification authority, ACEA in Euro and JASO in Japan.

Japanese engine manufacturers had at time insisted certain API oil NOT be used but this fact is seldom known. For example, in 1999, they will insist API CG4 not be used even though at the time, CG4 is the then latest API certification. Another example would be sulfated ash. Euro spec calls for low SA but Japanese calls for high SA.

Therefore, I would strongly suggest you look for oil that has the JASO DH certification. But I presume it may be difficult in Britain so the next best thing is to look for the Global DHD certification.

My 2 pence.

Peej · Posted: Tue Aug 28, 2007 8:59 Post subject:

Tourist · *** Joined: 23 Jan 2007 Posts: 136 Location: Malaysia

There should be quite a number of oils with the Global DHD-1 rating. It's a universal oil that satisfies the API, ACEA and JASO standard. It may not be the best oil for Japanese engines, as far as specification goes, but it's better than nothing.

For example, the popular Caltex Delo 400 15W40.

Peej · Posted: Tue Aug 28, 2007 9:34 Post subject:

Philp · Posted: Tue Aug 28, 2007 10:14 Post subject:

There are shed loads of high mileage UK spec troopers around that will have had UK spec oil there whole life. I doubt UK Isuzu dealers buy their oil from Japan, I suspect it will come from their local oil wholesaler here in the UK. OK if you're talking about a highly stressed turboed petrol engine in something like a Skyline then maybe it would make a difference but a big lazy ole lump of a diesel I suspect not. No one is going to sell a vehicle in this country as a UK spec vehicle and then expect you to buy in oil from Japan or a specialist supplier.

I do buy the oil for my chevy from a specialist but thats because 10W30 is not an easy grade to find in the UK.
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Phil

96 or is it a 98 Isuzu Bighorn Lotus

Peej · Posted: Tue Aug 28, 2007 10:23 Post subject:

Grandad · ******* Joined: 22 Sep 2005 Posts: 1902 Location: NORFOLK

just out of interest i have spoken to two main dealers and two motor factors and none of them had a clue what i was talking about when i mentioned global DHD-1 or JASO as an oil spec

Hard1 · Posted: Tue Aug 28, 2007 21:30 Post subject:

But it's out there......

[web:26fb80e733]http://www.enginemanufacturers.org/admin/library/upload/842.pdf[/web:26fb80e733]
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1999 Cougar with a NICE motor..

Click HERE to see under my bonnet!

Tourist · *** Joined: 23 Jan 2007 Posts: 136 Location: Malaysia