GEAR OIL: What do you use? 90 or 140 grade

**jkyamog** · July 21st, 2004 08:33 PM

Wow wiretap that looks very expensive. Will look for mineral based oils na lang. Caltex site does show they have 90 GL5, lets see how it goes.

**wiretap_md** · July 21st, 2004 09:03 PM

Yup, its a bit expensive pero take note na its synthetic. Now that I have it in my rear differential, I notice a smoother run as compared to before. If I have the funds, I'll replace my tranny and transfercase oil as well kahit na the minimum rating for it is GL-4 lang.

**jkyamog** · July 21st, 2004 09:12 PM

wiretap,

Don't put GL5 oils on GL4 equipment such as tranny and transfer case. It will eat up the gears, GL5 has additives not good for soft metals such the ones used for tranny and transfer case. Look for synthetic GL4 gear oil.

**wiretap_md** · July 21st, 2004 09:52 PM

Really? Hmmm... kasi I was consulting my Chilton Manual here for my rig and it said na my transfer case and transmission can use GL-4 oils or better. So this means na pwede GL-5? Pero yung sa front and rear axles, specified talaga na GL-5 dapat.

**jkyamog** · July 21st, 2004 11:02 PM

Hi wiretap.

See my post here that links to Shell site, 2nd to the last post. I have also read about this on other sites too.

http://daihatsuclub.proboards2.com/i...num=1086880768

BTW since your Suzuki said "or higher" it maybe ok. Pero if I where in your place, I would play it safe and use GL4. Based from what I have seen on your posts in tsikot and other sites, I bet you will go for GL4 synthetic.

**jackaroo** · July 22nd, 2004 07:42 AM

wiretap,

There's Redline synthetic MT-90 which is a 75w90, GL4 designed for manual trans. Don't know current price now.

**wiretap_md** · July 22nd, 2004 10:06 AM

Ok. Thanks guys!

**paj4x4** · July 27th, 2004 03:09 PM

Originally posted by jkyamog
wiretap,

Don't put GL5 oils on GL4 equipment such as tranny and transfer case. It will eat up the gears, GL5 has additives not good for soft metals such the ones used for tranny and transfer case. Look for synthetic GL4 gear oil.

oh no! anyone experienced this already?

i put mobil 1 fullsynt (75-90w), GL5 rated gear oil in my gen 1 pajero's tranny and transfer case. although the owners manual states "GL4 or better".

what do you guys think? should i stick with the mobil 1 or replace it with a GL4 rated gear oil.

thanks!

**jkyamog** · July 27th, 2004 04:48 PM

Hi paj4x4,

It really depends on the metals used in your tranny and tcase. What I said is not a rule, etc. It really depends. Try to read around for this or look at the shell link in my DCP post. Also I don't think its going to eat the gears instantly. If you want to be in the safe side on your next gear oil change use GL4 synth or mineral.

**paj4x4** · July 27th, 2004 08:34 PM

jkyamog,

thanks for the info. i'll look into your post in the Shell site.

any good synthetic GL4 gear oil (hyphoid) available here? i usually get my oils/lubricants from the US and my next trip is not until summer next year.

i've looked around in the past and i've only come across mobil 1 fully synthetic gear oil (75-90w)...and the price is terribly high at around P650-700 per quart. i get this from the US at less than half the price. how about castrol hypoy 90w? is it a good brand and GL4 rated?

thanks!

paj4x4