15W40 Diesel oil used.. thoughts?
11-17-2010, 05:52 PM
#11
Audi Forum - Posts like a Q5
Join Date: Aug 2010
Location: Calgary
Posts: 531
Re: 15W40 Diesel oil used.. thoughts?
15W40 ran my cat for a million km's suffice to say that that with dual rated oils that it would seem kind of heavy for neg temp starts when 5W40 is available, but that is all and the detergents that are inherent in 15w40 as one of the previous posts stated that it should be clean as a whistle inside as you noted it was. Drive it like you stole it!
I find it ok up to minus 25 degrees, but the engine will start on it even in minus 31.
On the other hand 20W50 is way too heavy but it was OK for my 1.8 liter Jetta.
5W20 means engine ruined in 100km.
11-17-2010, 05:57 PM
#12
Audi Forum - Posts like an A4
Thread Starter
Join Date: Nov 2010
Location: Canada
Posts: 180
Re: 15W40 Diesel oil used.. thoughts?
I was reading through the manual for the types of oils recommended.. and theres all types for different driving conditions. My handbook actually stated 10W50 as a choice
It also said that using 5W30 is fine for short trips and non hwy driving. I'll just be safe and use either 10W40 or 15W40...
It also said that using 5W30 is fine for short trips and non hwy driving. I'll just be safe and use either 10W40 or 15W40...
12-08-2010, 06:08 AM
#13
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Join Date: Dec 2010
Location: San Francisco, California
Posts: 3
Re: 15W40 Diesel oil used.. thoughts?
I just found out that the previous owner of the A4 we purchased was using a non synthetic 15W40 Diesel oil in our 2.8.
i'm in aww here... Never have I heard of this being used in this motor and i'm not sure what to do about it. I have always used fully synthetic in my previous Audi's.
Has anyone ever heard of this? Can I change to a non diesel oil now? What oil is suggested? Due to the fact its been ran most of its life on non synthetic, i think i'll have to stick with reg motor oil unless semi is an option. I've always been told to not change to synthetic after its been used with reg oil due to the fact that reg oil may have built up some sludge and the synthetic can break apart that sludge and have the chucks of broken down sludge go through the motor.
Thanks in advance.
i'm in aww here... Never have I heard of this being used in this motor and i'm not sure what to do about it. I have always used fully synthetic in my previous Audi's.
Has anyone ever heard of this? Can I change to a non diesel oil now? What oil is suggested? Due to the fact its been ran most of its life on non synthetic, i think i'll have to stick with reg motor oil unless semi is an option. I've always been told to not change to synthetic after its been used with reg oil due to the fact that reg oil may have built up some sludge and the synthetic can break apart that sludge and have the chucks of broken down sludge go through the motor.
Thanks in advance.
12-10-2010, 03:56 PM
#14
Audi Forum - Posts like an A1
Join Date: Feb 2009
Location: Calgary
Posts: 20
Re: 15W40 Diesel oil used.. thoughts?
Are you joking about the "power" in the 2.8L?
It's a rock solid motor, but it definately is not a powerhouse haha.
and OP you should be running 15w40 synthetic motor. It will say on the bottle that its for German cars.
It's a rock solid motor, but it definately is not a powerhouse haha.
and OP you should be running 15w40 synthetic motor. It will say on the bottle that its for German cars.
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