Diesel instead of Synthetic 5w40

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I work at an oil change place, and we're running low on 5w40 synthetic oil. The next shipment doesn't get in for a few days. My manager says that if (when) we run out we'll just use 5w40 diesel oil or 5w30 synthetic instead. Of course, no need to tell the customer.

So are we about to do subtle damage to people's engines?
 
Don't answer the question above regarding your shops name location. Depending on what diesel you use some would possibly argue that to much zddp can hurt the cat or that high magnesium additive in diesel can cause wear in a gas engine.
 
Also some diesel oil is also approved for gasoline engines. At least I know rotella t6 is anyway
 
Originally Posted By: fmia
Also some diesel oil is also approved for gasoline engines. At least I know rotella t6 is anyway


I would say most Diesel oils I have seen are also Gas engine rated.
 
Originally Posted By: fmia
Don't answer the question above regarding your shops name location. Depending on what diesel you use some would possibly argue that to much zddp can hurt the cat or that high magnesium additive in diesel can cause wear in a gas engine.

If they are running out of 5w40 I would say it's Euro specific stuff, and add pack should be stronger than diesel oil.
OP; no harm will be done, but it's dishonest and borderline illegal. Unfortunately it's in line with American business ethics.
 
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Yes, it would help to know what 5w-40 you're short on and what 5w-40 HDEO you're using to replace it. If it's 5w-40 Castrol being replaced by any mainstream 5w-40 HDEO, you might be doing the customers a favor.
wink.gif
 
True to an extent.. Rotella T6 is API SM approved. Not SN. So if someone's car is specd to run on SN formulation this could be an issue to a degree. I'm lucky though because my car can run the API SM formulation ..
 
Originally Posted By: bbhero
True to an extent.. Rotella T6 is API SM approved. Not SN. So if someone's car is specd to run on SN formulation this could be an issue to a degree. I'm lucky though because my car can run the API SM formulation ..

Not many American cars using SN 5w40 oil...
 
Originally Posted By: chrisri
Originally Posted By: bbhero
True to an extent.. Rotella T6 is API SM approved. Not SN. So if someone's car is specd to run on SN formulation this could be an issue to a degree. I'm lucky though because my car can run the API SM formulation ..

Not many American cars using SN 5w40 oil...


Must be a Porsche or Ferrari dealership then.
 
Originally Posted By: chrisri

OP; no harm will be done, but it's dishonest and borderline illegal. Unfortunately it's in line with American business ethics.



A crack about ethics coming from someone in Croatia is astounding. Croatia: We never lie about the oil we put in your car and if you don't ask about what we did to Jews and Serbs, we won't lie about that, either.
 
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Originally Posted By: OneEyeJack
Probably not to the engines. But what about not telling the truth to the customer. Where does the deception end?


^^ This
 
Originally Posted By: Some_quiet_guy
I work at an oil change place, and we're running low on 5w40 synthetic oil. The next shipment doesn't get in for a few days. My manager says that if (when) we run out we'll just use 5w40 diesel oil or 5w30 synthetic instead. Of course, no need to tell the customer.

So are we about to do subtle damage to people's engines?


I can't believe the nonsense that was posted in response to this.

1. They're running low on 5w-40, they're not out of it.

2. The OP claims the manager said to substitute IF they run out.

3. They way this post is written, it is unclear if the manager said anything about not informing the customer.

4. Since no specific products or vehicles are mentioned. there is no way to assume that IF a substitution takes place, the diesel 5w-40 would be inappropriate for a given vehicle IF the shop runs out of PCMO 5w-40 and IF a customer comes in with a vehicle that cannot use the diesel 5w-40 they have in hand.

5. Shouldn't he be calling the local TV consumer reporter to set up a sting?

6. No shop name, no product specifics and not even a claim of the wrong product actually being sold to any customer or any customer being lied to.

7. Isn't interesting that the OP never stated whether he would go along with the alleged instructions of his manager? I want to know what HE intends to do. Will he follow orders or tell a customer he's using the wrong oil?


Instead, everybody flies off the handle and one guy from Croatia claims this is typical American business ethics impuning every American business. It's almost as funny as the thread on AutoGeek wherein the OP is horrified by seeing terry cloth towels and not a single microfiber at a new car dealer's detail shop.
 
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Originally Posted By: Shannow
Originally Posted By: chrisri
Originally Posted By: bbhero
True to an extent.. Rotella T6 is API SM approved. Not SN. So if someone's car is specd to run on SN formulation this could be an issue to a degree. I'm lucky though because my car can run the API SM formulation ..

Not many American cars using SN 5w40 oil...


Must be a Porsche or Ferrari dealership then.



Try reading. It's an "oil change place".
 
I question the validity of this thread......but this is why "oil change places" have such a bad rap and I stay clear of them. Do it my self or my trusted mechanic.
 
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Originally Posted By: SonicMustang
Originally Posted By: Shannow
Originally Posted By: chrisri
Originally Posted By: bbhero
True to an extent.. Rotella T6 is API SM approved. Not SN. So if someone's car is specd to run on SN formulation this could be an issue to a degree. I'm lucky though because my car can run the API SM formulation ..

Not many American cars using SN 5w40 oil...


Must be a Porsche or Ferrari dealership then.



Try reading. It's an "oil change place".


And to reiterate other posters...how many AMERICAN vehicles specify 5W40...synthetic.

Comprehension was never your strong point.
 
Originally Posted By: Scum_Frog
I question the validity of this thread......but this is why "oil change places" have such a bad rap and I stay clear of them. Do it my self or my trusted mechanic.



What the [censored]??? There is ZERO logic in your post. You incorrectly question the validity of the thread instead of the first post post and then you give the first post validity by claiming that unverified information about oil change places is why you do your own changes.

That's BRILLIANT.
 
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