PLease Help!! Which oil? - PeachParts Mercedes-Benz Forum

Manuel · #1 05-24-2007, 10:20 AM

Hi all. I need a motor oil change for my '91 300D 2.5Turbo and i was thinking maybe i can use another oil because the engine is not good anymore... the oil pressure stays in the middle when the engine is warm

. Currently i use Castrol Viscus.
Which oil would be good? Would be ok if i use some oil additives?
Thanks!!

rrgrassi · #2 05-24-2007, 10:33 AM

You need to use a diesel rated oil. Have you checked the oil sender and guage for proper operation?

Never heard of Castrol Viscus. Where are you located?

Adding location and type of car in your signature will keep you from having to tell this every time you have a question.

vstech · #3 05-24-2007, 10:40 AM

when you say the engine is not good cause the oil stays in the middle when warm... what are you talking about? oil pressure at idle? or when traveling at speed? or are you talking about the oil level on the dipstick?
John

jbach36 · #4 05-24-2007, 10:44 AM

Ah yes, thank you for yet another posting with PLEASE HELP! as if it's an emergency situation. There are many other posts on oil, just do a search.

Manuel · #5 05-24-2007, 11:22 AM

Ah ok thanks rrgrassi im new here, ill edit my profile

. Im in Paraguay i havent checked the oil sender and guage... my oil pressure at idle stays in the middle, yes. When im at speed is of course at 3.
This is the oil, but not in english.
http://www.castrol.com/liveassets/bp_internet/castrol/castrol_mexico/STAGING/local_assets/downloads/n/nuevo_castro_ultramax_viscusl.pdf
It is an emergency situation, i dont know if sell the car or rebuilt the engine...

vstech · #6 05-24-2007, 11:29 AM

oil in the middle of the gauge at idle is normal.
no reason to rebuild the motor.
John

tobybul · #7 05-24-2007, 11:35 AM

Quote:

Originally Posted by Manuel

Ah ok thanks rrgrassi im new here, ill edit my profile

. Im in Paraguay i havent checked the oil sender and guage... my oil pressure at idle stays in the middle, yes. When im at speed is of course at 3.
This is the oil, but not in english.
http://www.castrol.com/liveassets/bp_internet/castrol/castrol_mexico/STAGING/local_assets/downloads/n/nuevo_castro_ultramax_viscusl.pdf
It is an emergency situation, i dont know if sell the car or rebuilt the engine...

Manuel, mi amigo.... from what you described, the oil pressure gage is suppose to stay at the middle when idling...when you press the gas pedal, its suppose to go up...

Gurkha · #8 05-24-2007, 11:59 AM

Castrol CRB Viscous is a old 25W-50 CC rated oil, till few years back it was sold here in India, quite popular with the taxi crowd due to its lowered consumption, the oil gets thick quite quickly once inside the engine.

For you I would suggest Delo 400 or Delvac MX, both of which are freely available in SA.

Manuel · #9 05-24-2007, 12:02 PM

Good, thanks but sometimes when the weather is hot like 40 celsius degrees the pressure goes down to 1, is that also normal? when idling of course..

d.delano · #10 05-24-2007, 12:05 PM

Manuel your engine is OK. Be sure to use diesel-specific oil. Change it hot, and change it often. No need for rebuild.

rrgrassi · #11 05-24-2007, 12:07 PM

Yes, it's normal. Also if using a gasoline engine rated oil, it loads up with soot rapidly and cannot handle the shear pressures exerted by a diesel.

tobybul · #12 05-24-2007, 02:44 PM

Quote:

Originally Posted by Manuel

Good, thanks but sometimes when the weather is hot like 40 celsius degrees the pressure goes down to 1, is that also normal? when idling of course..

Maybe you can tell us what oil grades are available to you in Paraguay so we can try to give you better suggestions.

Manuel · #13 05-24-2007, 03:59 PM

Actually this new Castrol Viscus is 25w 60 and i think is very heavy... id like to do an oil change with another oil maybe 20w 40? because we just started winter here...
I could get Valvoline, Esso, Ursa, Castrol, 76.
Whichone do you guys recomend?