Jap Engines that can use 5W20 oils.

[Glyuen]

Hi all, been searching high and low the net for this, but it only listed Jap makes. Its from Autobacs and is in Jap. I got it translated using Altavista Babelfish Translator...so if any one can read Jap, please help to clarify. Here's the link:

 

http://babelfish.altavista.com/babelfish/t...eceeedfgfdffg.0

[Apollo]

no sh1t... tat's the longest post I've come across. it's measuring at least 20inch and can't fit into my screen at all...

 

thanks dude

[Glyuen]

You're welcome...managed to find your engine there?

[Genie47]

What I got is a Yahoo 404 error with the link.

[Genie47]

I've seen the page. No need translation. Just note the engine codes eg. 1NZ-FE from Toyota and so forth.

 

http://www.autobacs.com/cgi-bin/inetcgi/sc...il_toku_eco.jsp

[Blackmamba]

My Sunny manual indicates can use 5W20 for its QGXXDE engines. However that is only when outside temperature is in the range of -30C to -10C.

 

For Singapore weather anything below 10W30 is unsuitable.

[Genie47]

Any 5W20 can still be used in Singapore's weather. The Honda owners are using them now. As long as you don't chiong NSH, still OK. The wear is proven to be not an issue because the 20wt oils show about the same wear numbers as a 30wt and 40wt.

[Blackmamba]

Is there a specific website which can show reliable data with regards to the engine wear and tear using the W20, W30 and W40?

 

If wear and tear is the same then all of us with new cars should using W20 oil in Singapore as the fuel efficiency will be better with W20 oil as the viscosity is lesser at high temperature.

[Genie47]

Check Ken4's Camry on 5W20 UOAs in BITOG. I used 5W20 for my Aveo. Did a high speed run on the NSH and the oil UOA gave strange results. Lots of 5W20 users in hot Texas and Florida as well. All at BITOG.

 

Just don't go whacking up the NSH with 5W20.

 

Finally there is the issue of availability. Only RP carries 5W20 in Singapore. The other is Fuchs with its 0W20 but Ken4 said it was horrible with the RP performing better. Ditto with the Motul.

Edited December 3, 2005 by Genie47

[Genie47]

For starters see Ken4's Camry with the trace.

 

http://theoildrop.server101.com/cgi/ultima...ic;f=3;t=002507

 

You can see my trace up to Mar this year (2005) with the Conoco Hydroclear but that saw a range from 5W20 to 5W40. there is not much difference in between the 5W40 and 5W30 but oxidation numbers and nitration numbers are high with the 5W20 because of the high speed insanity at 170kph to Melaka.

 

http://theoildrop.server101.com/ubb/ultima...ic;f=3;t=002427

 

Finally right now, I am using Citgo 10W30. According to the BITOGers, it is known to shear down to a 20wt very early. So I might be running a 20wt oil as of now. Analysis will be coming soon.

 

What is worrying is not the oil viscosity for us Singapore users. It is the damn air! All the SG users report double digit silicon numbers. That means sand/clay whatever in the air. All the SG users are using stock paper filters. If it is already so bad with stock filters which do the best filtration, you can imagine the people with the K&N and Hurricane.

[Vit4wd]

What are the primary advantages of a thinner oil? ... say '20' vs '40' or '60'

[Genie47]

Reduced component drag.

[Cyberet]

interestingly, I've got a Silicon reading of 3, and I'm using a K&N Drop in

Oil has only done 4511km though

anyway i'ved changed to a stock paper filter, UOA in progress, lets see how does it do now

Edited December 10, 2005 by Cyberet

[Genie47]

4k? Not enough for good UOA lah! You should run it to the full 10k.

[Cyberet]

hehe, the current sample i've sent is rp 5w20 8k, then i drop in arx.. waiting for rinse

 

anyway the previous UOA turns out that my mech did not use the rp 5w30 i provided

Edited December 10, 2005 by Cyberet

[Cyberet]

UOA for RP 5w20

8081km done

Mazda 323 1.6 auto

 

Al 1

Ca 1539

Cr 1

Cu 7

Fe 10

Pb 23

Mg 97

Mo 73

P 673

K 2

Si 25

Na 1

Sn 0

Zn 827

Soot 0

Oxidation 113

Nitration 96

Sulfation 115

Water N

Antifreeze N

Fuel N

V100 9.7

TBN 1.5

[Genie47]

Wah lau! TBN become 1.5! Cannot go anymore already! I think 10k is the maximum.

 

Wow! Nitration, sulfation and oxidation numbers are high! Must be the damn humidity and heat and maybe our fuel.

 

Si still double digit like all of us.

 

Cr only 1!

 

No fuel dilution.

 

I'm a bit worried to see the lead. Indicative of bearing wear. The Si could be the cause. Possibly also expected of a thin oil. Doesn't coat well on bearings. You use cotton filter?

 

Post in BITOG UOA folder and see the response.

Edited January 11, 2006 by Genie47

[Trex101]

Quite disappointed with RP drain interval, it suppose to be long drain oil. The lead(23ppm) look abit high but should be within acceptable limits.

If RP 5w20 don't improve your FC much then i suggest you up your oil wt to 5w30.