Wrong oil used - PeachParts Mercedes-Benz Forum

subman60 · #1 10-09-2013, 08:32 AM

I've owned my 240d for two years now and it's been driven about 4,000 miles in that time. I have changed the oil 3 times, when I first bought it, after the first yeast and yesterday. The first 2 times it was changed I used casterol GTX 10w40, yes I should have known better but didn't. What is the chance I've caused wear to the engine. By the way yesterday I used rot tells 15w40.

zorecati · #2 10-09-2013, 08:46 AM

Quote:

Originally Posted by subman60

I've owned my 240d for two years now and it's been driven about 4,000 miles in that time. I have changed the oil 3 times, when I first bought it, after the first yeast and yesterday. The first 2 times it was changed I used casterol GTX 10w40, yes I should have known better but didn't. What is the chance I've caused wear to the engine. By the way yesterday I used rot tells 15w40.

Zero to none.

JB3 · #3 10-09-2013, 09:19 AM

Quote:

Originally Posted by subman60

I've owned my 240d for two years now and it's been driven about 4,000 miles in that time. I have changed the oil 3 times, when I first bought it, after the first yeast and yesterday. The first 2 times it was changed I used casterol GTX 10w40, yes I should have known better but didn't. What is the chance I've caused wear to the engine. By the way yesterday I used rot tells 15w40.

I use 5w40 on all my diesels.

The first number is the cold viscosity number, the second is the operating temp viscosity number.

the 5w40, 10w40, and 15w40 all have the same operating viscosity at 40, but the 10w40 and 5w40 will have a thinner viscosity at colder temps.

The reason I use 5w40 is especially in the winter it makes a huge difference in cold starts for the engine, lot easier for the engine to turn and fire and pump oil, call it spinning a spatula in water vs honey.

sloride · #4 10-09-2013, 09:36 AM

Quote:

Originally Posted by zorecati

Zero to none.

I would agree over 4,000 miles if not run real hard. The more important issue is the oil rating, your 10w40 more than likely is SI rated and typical 15w40 and 20w40 are CI rated.
SI = spark ignition and CI = compression ignition which is designed for better protection in a diesel engine.

kerry · #5 10-09-2013, 09:42 AM

X2 on zero to none. I'm thinking that even a non-diesel rated oil today is better than the oil that went into it when it was new.

Stretch · #6 10-09-2013, 09:59 AM

X3

Best to use an oil specific for a diesel engine though in my opinion but it is unlikely you've caused any additional damage - you're damaging it by using it! But if you don't use it will decay anyway...

subman60 · #7 10-09-2013, 10:32 AM

I tried to find a 5 or 10 weight conventional oil locally but no one carried it. I'm afraid the 15 weight might maske it harder to start this winter. Glad to hear I didn't cause any problems for the engine. I like this car and want to keep it for as long as I can.

oldsinner111 · #8 10-09-2013, 10:45 AM

I use 15 w 40 down to 14 degrees,in both my cars

cirrusman · #9 10-09-2013, 10:52 AM

Quote:

Originally Posted by subman60

...after the first "yeast" and yesterday.

Is that a particular ritual you 240rs have for your cars...?

subman60 · #10 10-09-2013, 12:16 PM

It's a little known Celtic ritual.
Spell check is a great thing most of the time on the I Phone.

vstech · #11 10-09-2013, 12:18 PM

Quote:

Originally Posted by subman60

I've owned my 240d for two years now and it's been driven about 4,000 miles in that time. I have changed the oil 3 times, when I first bought it, after the first yeast and yesterday. The first 2 times it was changed I used casterol GTX 10w40, yes I should have known better but didn't. What is the chance I've caused wear to the engine. By the way yesterday I used rot tells 15w40.

you have changed the oil 3 times in the last 4000 miles... but the first two were with 10w40 GTX oil... castrol does make good oil, but having the C rating is important for a diesel... however, your motor does not have a turbo, it's a relatively slow motor, and it's a fairly light car. odds are good that no "excessive" wear was introduced in the time/miles it was driven.

so... that's about 2000miles on each oil change (the most recent change I'm assuming was just done, and has little mileage accrued so far, yes?)
I highly doubt enough was done to cause problems with this oil. You did change the filter at the same time, yes?

subman60 · #12 10-09-2013, 12:31 PM

Yes I changed it yesterday and used a new NAPA Gold filter.

sixto · #13 10-09-2013, 01:27 PM

One difference is gasser oils don't have capacity to suspend soot. Since you change oil frequently, assuming 3 changes over 4,000 miles were evenly spaced, you probably didn't overwhelm the oil.

Sixto
87 300D