Rotella - Made car FEEL better, now IDLES LOUDER ?!?!

Status
Not open for further replies.
D

DJStillman

Joined
Jul 19, 2003
Messages
193
Location
Raleigh, NC
Just finished changing oil from Chevron Supreme 5w30 w/ Supertech ST8A oversized Filter to Rotella T SYN 5w40 w/ Supertech ST8A oversized Filter on my 91 Acclaim 2.5 4 cylinder.

Took it out for a drive, and it feels really good compared to the Chevron, i.e., with the effort that used to get the car to 80mph, got to 95mph.

Seems quieter while driving, and peppier on dead acceleration. BUT, now it idles way louder, i.e., I went from having a hint of noise sounding like a diesel engine to full out sounding like a diesel engine. Is it just the oil, or is there something I can fix?? I just spent $28 for the oil, and would really hate to have to dump it...

Does the fact that this new oil is causing so much more noise mean that it is hurting my engine?

Please HELP!!!
 
Maybe the engine thought it was a Diesel since you filled it with the Rotella.
wink.gif


Seriously, I don't know why your engine would sound different. I am interested in finding out why your engine is noiser.
 
Remember that Rotella T is a HDEO. To control HD diesel motor soot loads and to keep Top Grove Fill in control, that oil has massive detergent / dispersant treat levels.

It's unwise to switch a car with a lot of miles on it over to a HDEO, as you can expect cleaning to occur inside the motor.

It's far safer to do a short, or several short, OCI with dino oil and a good flushing agent like Auto RX. That will safely get the accumulated sludge, carbon, and varnish out.

Then you can safely switch to a HDEO like Rotella. Used in a new motor, a HDEO will keep the motor spotless.

Does that Acclaim use OHC? Do you know if they require periodic valve adjustment? If the HDEO has started knocking deposits out of the valvetrain, you may need a valve adjustement.

Jerry
 
quote:
Originally posted by heyjay:
It's unwise to switch a car with a lot of miles on it over to a HDEO, as you can expect cleaning to occur inside the motor.
Click to expand...
Heyjay,

Have you ever switched a high-mileage, "neglected" gas-engine to a HDEO?

I have on several cars and trucks, as well as a few tractors, lawn equipment, ATV's (etc, etc..), and I've never had a problem.

With that said, the only time you're gonna have a problem with an HDEO, or synthetic for that matter, is when an issue previously existed, such as bad seals (valve, engine) that seems to be the most common issues.

Are far as I'm concerned, the cleaning that occurs with HDEO's is gradual, and any matter will be suspended in the oil with larger particles getting caught by the full-flow filter.
 
No, but I have switched a high milage neglected HD diesel motor from a poor quality HDEO to Mobil Delvac 1.

I had plugged oil filters and plugged galleries.

It was a cheap "yard mule" that ended up being sent to the dump. So from that time on, I've been leery of switching to higher-detergent oils with a high mile motor.

Jerry
 
quote:
Originally posted by heyjay:
No, but I have switched a high milage neglected HD diesel motor from a poor quality HDEO to Mobil Delvac 1.

I had plugged oil filters and plugged galleries.

It was a cheap "yard mule" that ended up being sent to the dump. So from that time on, I've been leery of switching to higher-detergent oils with a high mile motor.

Jerry
Click to expand...
Neglected Diesel engines , as you know, are a different animal in comparison to a neglected gas engine...amazingly high amounts of soot and sludge, along with "cooked" oil most noteably appearing in the ring-pack and turbo will clog up oil filters and plug galleries and pick-up screens.

After the switch, you weren't running a by-pass filter on this engine, were you??
 
I have. One of the first things after using M-1 15-50 (after a steady diet of 30 weights) with poor results is to use Delvac 1.

The power increase you may be feeling is most likely due to the increased sealing power of the 40 weight thereby increasing compression.

IMO, do not worry about the noise. There is no oil-related damage going on. You may be hearing the engine running differently since the thicker operating viscosity. Give it time to clean things out. It may take several thousands of mi's thou. Hang in there.
 
It is common for valve train noise to vary greatly from one oil to another! It is not hurting anything. I would just let it be for now and then when your next oil change rolls around try another oil!.

Why did it cost $28??? Rotella-T Synthetic sells for $12 a gallon here. DOes that little engine hold 2 gallons of oil?
 
quote:
Originally posted by JohnBrowning:
Why did it cost $28??? Rotella-T Synthetic sells for $12 a gallon here. DOes that little engine hold 2 gallons of oil?
Click to expand...
No, I had to get 2 gallons, since I need 5 quarts, and I could find no single quarts where I live.

M1 Truck & SUV, come to Midland and save me!!!
 
quote:
Originally posted by DJStillman:

quote:
Originally posted by JohnBrowning:
Why did it cost $28??? Rotella-T Synthetic sells for $12 a gallon here. DOes that little engine hold 2 gallons of oil?
Click to expand...
No, I had to get 2 gallons, since I need 5 quarts, and I could find no single quarts where I live.

M1 Truck & SUV, come to Midland and save me!!!
Click to expand...
Yeah, but think...you'll only have to buy one gallon next time around!
 
quote:
Originally posted by heyjay:
It's unwise to switch a car with a lot of miles on it over to a HDEO, as you can expect cleaning to occur inside the motor.

It's far safer to do a short, or several short, OCI with dino oil and a good flushing agent like Auto RX. That will safely get the accumulated sludge, carbon, and varnish out.

Then you can safely switch to a HDEO like Rotella. Used in a new motor, a HDEO will keep the motor spotless.

Does that Acclaim use OHC? Do you know if they require periodic valve adjustment? If the HDEO has started knocking deposits out of the valvetrain, you may need a valve adjustement.

Jerry
Click to expand...
1. The cleaning would not be instantaneous after changing the oil and doing 1 drive.

2. I guess you didn't see, but I did 2 Neutra treatments to the engine, splitting about 1500 miles total between 2 full oil changes.

3. Yes, the motor is SOHC, but has hydraulic valve adjustment.
 
quote:
Originally posted by Jelly:

quote:
Originally posted by DJStillman:

quote:
Originally posted by JohnBrowning:
Why did it cost $28??? Rotella-T Synthetic sells for $12 a gallon here. DOes that little engine hold 2 gallons of oil?
Click to expand...
No, I had to get 2 gallons, since I need 5 quarts, and I could find no single quarts where I live.

M1 Truck & SUV, come to Midland and save me!!!
Click to expand...
Yeah, but think...you'll only have to buy one gallon next time around!
Click to expand...
Yeah, but the only reason I got the Rotella was to try 5w40. If the car is ok, then it is Delvac 1 or M1 T&SUV.
 
Well, I took a long drive today after the change, and it is exceptionally smooth while driving, but still as noisy idling.

Any new thoughts?
 
I switched to this a few weeks ago(from Amsoil 5W30) and I found basically the same thing, my car does have roller rockers so it would be louder than most anyway. I don't think it made it exeptionally loud, more like the Amsoil made it quieter than others I had tried. If something changes as I get more miles I will try to post back.
 
quote:
Originally posted by Jelly:

quote:
Originally posted by heyjay:
No, but I have switched a high milage neglected HD diesel motor from a poor quality HDEO to Mobil Delvac 1.

I had plugged oil filters and plugged galleries.

It was a cheap "yard mule" that ended up being sent to the dump. So from that time on, I've been leery of switching to higher-detergent oils with a high mile motor.

Jerry
Click to expand...
Neglected Diesel engines , as you know, are a different animal in comparison to a neglected gas engine...amazingly high amounts of soot and sludge, along with "cooked" oil most noteably appearing in the ring-pack and turbo will clog up oil filters and plug galleries and pick-up screens.

After the switch, you weren't running a by-pass filter on this engine, were you??
Click to expand...
Jelly:

That old tired beast didn't even have a bypass filter. Also wasn't a turbo, an ancient Cornbinder.

I should have known better. Just for moving trailers around in the yard, I shouldn't have even changed the oil. It may have run for a few more years.

Well, it cost $3,200. So much for the "yard mule" though I managed to pick up another one, a tired old Mack, for $4,800.

That thing ran almost 10 years in the yard. Just added oil, never changed it, I learned my lesson.

I didn't want to take one of the new Peterbilt fleet tractors, start it up, work it 5 minutes, and shut it off. So I happily keep around some tired old heap for that duty.

That's why I have always been leery of switching ANY used motor to a high detergent synthetic oil. Once burned, twice shy.

Jerry
 
quote:
Originally posted by DJStillman:
Well, I took a long drive today after the change, and it is exceptionally smooth while driving, but still as noisy idling.

Any new thoughts?
Click to expand...
I just wanted to bring this to the top to see if you have gone back to a viscosity and a formulated gasoline engine like this engine needs for where it is used and found that it cured the woe's the HDEO probably caused .

Or is the engine now ....dead
frown.gif
 
You may want to use a mixture with 3qts of 5W30 and 1qt of Delo 400(assuming a 4qt crankcase).
 
Status
Not open for further replies.

Similar threads

M
Valvoline restore and protect ford 3.7
5 6 7
Replies
122
Views
27K
Joenpb
E
Ford F-150 5.0 Coyote Tick and Oil Type
Replies
13
Views
6K
b_b
OM605
Mercedes: motor mounts bad out of the box?
2
Replies
29
Views
3K
Andyd95
A
Help with Engine knock - rod bearing/hydaulic lifter/fuel injector, which one?
2
Replies
29
Views
3K
notharry
Bailes1992
Dipetane
Replies
10
Views
1K
vOil
Back
Top Bottom