1989 Isuzu Trooper oil with high mileage

[Alexis]

Hi guys. I have a 1989 First Generation Trooper with a 4ZE1, 2.6 engine . It hit 251,000 miles. I’ve been using Mobil 1 10w40 high mileage oil. 4 years ago I installed an OEM IHI Turbo and manifold from a 1989 Impulse. Running 13 psi. Should I keep using this oil? I want this engine to last another 250, 000 miles. It is not my daily driven vehicle. I only use it in my farm and some 4x4 trail trips with my friends once a month.

I was planning to upgrade to 15w40 Rotella Synthetic one.

By the way, I live in a Tropical island where year’s average temperature is 80 throughout the year. I live in the mountains. On winter it can reach 60F and on summer can reach 100F.

I was thinking about 20w50 but I think it is to thick.

Based on the vast experience of you guys, what would be be the best oil to minimize shear and wear ?

Thanks in advance for any advice.

 

[RooflessVW]

Sounds good to me! I'd keep doing what you're doing

 

[atikovi]

I want this engine to last another 250, 000 miles. It is not my daily driven vehicle. I only use it in my farm a some 4x4 trail. runnings.

It will take 100 years of farm use and trail running to drive it another 250,000 miles. Will YOU be around in 100 years?

 

[Alexis]

And of course, from time to time this Trooper sees highways and freeways. It is a turbo Trooper. It is fun to ride it on the freeways as well on the trails.

 

[Alexis]

Any other brand that will protect better than Mobil 1 ?

 

[RooflessVW]

Any other brand that will protect better than Mobil 1 ?

Not really, not between brands.

The 4ZE1 isn't really hard on oil. Mine is at 199k and I have been feeding it Maxlife 5W-30.

 

[MalibuRam65]

Any other brand that will protect better than Mobil 1 ?

Stick with Mobil 1 it’s been working well for you this far

 

[2000Trooper]

Not really, not between brands.

The 4ZE1 isn't really hard on oil. Mine is at 199k and I have been feeding it Maxlife 5W-30.

They’re only hard on the head gaskets

 

[RooflessVW]

They’re only hard on the head gaskets

c'est la vie

 

[Alexis]

They’re only hard on the head gaskets

I’ve heard many comments regarding head gasket problems with the Isuzu Troopers. I haven’t any problems with mine, even though my Trooper is turbo.

 

[dumkid]

I’ve heard many comments regarding head gasket problems with the Isuzu Troopers. I haven’t any problems with mine, even though my Trooper is turbo.

You probably haven't overheated it badly. Heat seems to take out more head gaskets than boost does, in general

 

[Alexis]

You probably haven't overheated it badly. Heat seems to take out more head gaskets than boost does, in general

You are right. I haven’t overheated my Trooper even though it has the 90 degree thermostat. Some time ago I knew a lower thermostat is available I bought it but I haven’t installed it. I think it is the 85 degrees one.