I have a 2001 Max with about 175k on it. I bought it with about 140k 2 years ago. I've used Castrol GTX 10W-30 conventional oil till this day. I want to start using a thicker viscosity (10w-40) due to the engine getting older but I'm also debating on whether I should use High Mileage oil. I've read many mixed reviews on this topic so I want to hear it from you guys now from experience too. Pros and Cons. I'm a loyal Castrol customer and I want to stick to it. I'm looking at the Castrol GTX High Mileage 10W-40 oil. It's a synthetic blend oil which has me a little scared since my engine has very high mileage. What do you guys think?

 

Main difference is that GTX HM is a syn blend like you said, vs regular GTX which is conventional. Despite it being syn blend, GTX HM is supposed to have additives that reduce leaks/burning.

I always ran regular GTX in my old 5.5 gen. I tried out GTX HM for a little while in hopes that it would reduce my oil burning, but I never noticed any difference so I switched back. So at your mileage, I would just stick to regular GTX and a high quality filter if I was you.

As far as the weights, I always ran 10w-30 in summer and 5w-30 in the winter. I've read good things about 10w-40 here on the forums (lots of threads if you search), but I never tried it so I can't speak for it personally.

 

I forgot to write that I do use the Mobil1 oil filter which I've heard is the best next to OEM. So I guess I'll try out the regular Castrol 10W-40 oil as see what's up.

 

Best oil could be debated till the end of time.... Mobil 1 vs Amsoil ect etc ect.....

If you love Castrol Gtx just don't use it during the freezing months if it gets really cold where you live.

oil viscosity:

 

Don't worry

If they're same price use one or the other

 

You cannot question a success, since I bought my maxima I have a problem on a cold start during winter time, metallic sound like the chain slipping on the sprocket. Since I used this oil Castrol GTX 5w/30 even we had a bad winter season this year in New Jersey, I have no single episode of metallic sound during cold start.

 

David Owens has science behind it just because you don't experience issues doesn't mean others won't...
Gastrol gtx=taffy during freezing...

 

crock of poop

 

I have 206,000 on my 01 and have been using Mobil-1 high mileage synthetic/filter. No issues here and love the oil.

 

Physical and chemical properties of Castrol GTX

Pour Point : -32 degrees Fahrenheit
Physical state Liquid.
Density :860 kg/m3 (0.86 g/cm3 Density )
Solubility insoluble in water.
Viscosity Kinematic: 10.6 mm2 /s (10.6 cSt) at 100°C

http://www.wascoonline.com/Customer/...L-GTX-5W30.pdf

 

don't believe everything you read on the internet

 

don't believe everything you watch on the youtube!

Product data from Castrol company
http://msdspds.castrol.com/bpglis/FusionPDS.nsf/Files/104F46BB1BB2C7B08025790200512AE2/$File/BPXE-8LF8XE_0.pdf

 

Ok i agree to disagree.... Mobil1 rules!

 

For the price the penz platinum is great stuff.
and from what i've been reading on bitog gtx is not so good.
Just get the supertech instead. Save some cash.