Oil pressure questions for a GE

[jdub]

Geezer - you've been out in the desert picking peyote buttons again. I live in Phoenix and fly to San Diego and LA on a weekly basis...it hasn't hit 90 during the winter since I've lived here (14 years)...high 70's maybe, but not 90. And what about the freezing temps two weeks ago...you didn't go outside? The chart you show has 20W-50 at the high temp range...not even close to the temps we have during the winter in the desert Southwest. Looking at that chart, a 10W-40 would be more appropriate for So Cal winters and IMO, that's still too thick.

You can choose to run that oil if you wish and ignore the high pressures it produces...that pressure is resistance to flow, pure and simple. You may read, but I am questioning your comprehension...what you say about oil does not make sense. JJ is not insulting you...he's calling it as he sees it. Your knowledge on motor oil is, lets say, rather "lacking".

Suggest you read these links...especially the last one:

http://www.nordicgroup.us/oil.htm#I...ows better when cold, i.e. 5W30 versus 10W30?

http://www.gi.alaska.edu/ScienceForum/ASF7/747.html

http://physicsweb.org/articles/world/15/2/7

http://63.240.161.99/motoroil/

 

[suprageezer]

Okay Jbud I get to choose what oil I run. Now on to attacking people of a difference of opinion than yours. Please just educate people and leave those attacks at home. Jet jock was certainly attacking my beliefs when he stated I was oblivious, You just attacked me with your childish comment of my knowledge as lacking, see what I mean. In the future if you just address the poster and not the responders allot more people won’t be afraid to disagree. As I've stated previously I respectfully agree to disagree. And yes we had some 90 temps here a few weeks ago, what should people do change oil viscosity’s with the change of the weather or choose an average?

 

[jdub]

It wasn't a childish comment...it was a statement of fact. Running one of the heaviest oils you can buy during the winter graphically illustrates that point...opinion is fine...gross misinformation is not. Your "opinion" just doesn't jive with the facts and you even posted a chart to prove it...and yes, average temps are what the chart is based on. Even disregarding the chart, "old school" conventional wisdom has changing the oil to lighter grades during the winter and heavier grades during the summer. Your "opinion" simply disregards that and the chart.

Take a look at the average Temps for San Diego:
http://www.cityrating.com/cityweather.asp?city=San+Diego

Here's Yuma:
http://www.cityrating.com/citytemperature.asp?City=Yuma

Here's LA:
http://www.cityrating.com/citytemperature.asp?City=Los+Angeles

Here's Palm Springs:
http://www.palmsprings.com/weather.html

Most have an average high in the high 50's and lows in the low 40's...sorry, but your statement is just not credible. And considering there were freezing temperatures across the Southwest less than 2 weeks ago, I am seriously wondering where you are getting 90 deg weather from. Jeez...the freeze here in Phoenix busted two water lines at my house 2 weeks ago!

Geezer - I'm not trying to insult you. But there is a lot to learn about modern motor oils...I've researched it a great deal and I've found much of the "old school" beliefs are just not true. And it's not opinion...it's based on the science today's petrol engineers are putting into formulating oil and automotive engineers put in to engine design.

 

[noremacsupra]

Hello,
I have a 90 supra turbo and the oil pressure gauge does not move is it the sensor thats broken or the gauge? I already changed the sensor but it still doesnt work. The niddle of gauge stays up and it does not move...PLease HElp ME..sory i dont know how to pose a question so i replied to this messege..sorry.
Thanks for anyone who replies

 

[noremacsupra]

PLEASE HELP
Hello,
I have a 90 supra turbo and the oil pressure gauge does not move is it the sensor thats broken or the gauge? I already changed the sensor but it still doesnt work. The niddle of gauge stays up and it does not move...PLease HElp ME..sory i dont know how to pose a question so i replied to this messege..sorry.
Thanks for anyone who replies

 

[phoenix6]

well first dude calm down haha. You need to test everything out. You have to make sure your sensor is working, if that is, you have to check your wire with a multimeter, if thats a go, might be the gauge, that or ur systems about to go boom. Your saying it stays up and doesnt move though, so it sounds like your gauge.

 

[johnathan1]

Here is the video I said I would get up:

LMK what you think:

 

[phoenix6]

Here is the video I said I would get up:

LMK what you think:

Is that at temp or cold?

 

[johnathan1]

Not quite to temp, but the engine had been driven less than an hour before...look at the temp. gauge.

 

[phoenix6]

Not quite to temp, but the engine had been driven less than an hour before...look at the temp. gauge.

sorry wasnt paying attention... that looks ALMOST like mine, mines just a little more but I did add that extra qt last time. I didnt read ur post from b4, sorry. Are u concerned that its too low?

 

[johnathan1]

IDK...possibly. The dealer put 5W-30 in it, and that's the thinnest cold viscosity oil I have ever had in the car, so I'm a little paranoid...lol.

 

[phoenix6]

IDK...possibly. The dealer put 5W-30 in it, and that's the thinnest cold viscosity oil I have ever had in the car, so I'm a little paranoid...lol.

Take that shit out! hahaha

I wouldnt go lowere than 10W-30, but to be safe I use 10w-40, it helps.

 

[mattjk]

5-30 is fine I think. As the oil gets more contaminated, it's going to loose it's viscosity and the oil pressure will continue to drop slightly. If you are really concerned, have them put half 5-30 and half 10-30 next time

 

[johnathan1]

Haha, I asked the guy at the dealer, and he said "We only put in the specific weight that is recommended by Toyot'a engineers"...so i was like okay...I don't think they will put in any weight other than the manuals recommendation, or I would have had them put in 10W-30.

 

[jdub]

Guys...you're not getting it. A 0W-30, a 5W-30, and a 10W-30 have almost identical viscosity's for a given brand and type (syn vs dino) at operating temp...you are giving the 1st number too much attention when the motor is warm. The 1st number only applies when the engine is cold.

Johnathan - How hard is it to post your oil psi numbers at idle (hot and cold) and at 3000 rpm (hot and cold)? That video is almost useless...1st of all you are rev'ing the motor at a stand still...the oil pressure barely has a chance to respond. You have to look at the psi at 3000 rpm steady state...that means take it out on the highway. From what I can see, your idle psi is fine...at least warm.

If you want my help, post the figures I asked for above (and post 38). In any case, a 5W-30 is not going to hurt your motor...especially in So Cal (ignore Geezer)...in fact, you are doing your motor a favor by keeping the viscosity low for cold start-up. I've been running a 0W-30 (German Castrol) for well over a year and Moble 1 5W-30 (one of the thinnest 30W's there is) before that.

Take a look at your manual...5W-30 is one of the oils listed.

 

[johnathan1]

Guys...you're not getting it. A 0W-30, a 5W-30, and a 10W-30 have almost identical viscosity's for a give brand and type (syn vs dino) at operating temp...you are giving the 1st number too much attention when the motor is warm. The 1st number only applies when the engine is cold.

Johnathan - How hard is it to post your oil psi numbers at idle (hot and cold) and at 3000 rpm (hot and cold)? That video is almost useless...1st of all you are rev'ing the motor at a stand still...the oil pressure barely has a chance to respond. You have to look at the psi at 3000 rpm steady state...that means take it out on the highway. From what I can see, your idle psi is fine...at least warm.

If you want my help, post the figures I asked for above (and post 38). In any case, a 5W-30 is not going to hurt your motor...especially in So Cal (ignore Geezer)...in fact, you are doing your motor a favor by keeping the viscosity low for cold start-up. I've been running a 0W-30 (German Castrol) for well over a year and Moble 1 5W-30 (one of the thinnest 30W there is) before that.

Take a look at your manual...5W-30 is one of the oils listed.

Sorry to have wasted your time jdub.

 

[mattjk]

Guys...you're not getting it. A 0W-30, a 5W-30, and a 10W-30 have almost identical viscosity's for a given brand and type (syn vs dino) at operating temp...you are giving the 1st number too much attention when the motor is warm. The 1st number only applies when the engine is cold.

I am... he's checking oil pressure below operating temp.

Your car runs great John, just stop driving it in boost all the time. LOL

 

[GotToyota?]

Suprageezer: I'm no Jdub, but 60 seems really high.

For mine, when I start it up in the mornings, it gets to around 30 and after warming up goes back down to about 5-10. On the highway I'm always around 40, and it will get up to 50 if I'm over 3-4k RPM. I'm running Castrol Syntec 5W-30, BTW.

-Matt

 

[jdub]

Ok Johnathan, if that's the way you want it...use whatever oil you wish.
And welcome to my ignore list :3d_frown:


Matt - That's about perfect

 

[GotToyota?]

YAY, I know I'm good to go whenever I get Jdubs approval.