Why Does My Truck Run Better on Conventional Oil?

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Recently switched to conventional from synthetic to save a few $$$. I noticed my Ford 5.4 liter runs smoother and just has a "tightger" sound from the engine. I know that is not very scientific but it was there. Any explanations/suggestions? Would the oil used at break-in when the piston grooves were formed have anything to do w/ that?
 
Originally Posted By: BumpDraft2004
Pennzoil 5w30 synthetic. Now using Pennzoil 5w30 cnventional.


Let me say that I am by no means an oil expert. From my reading here at BITOG it appears that PP is on the thin side as far as Synthetics go. One member here said it qualifies as a 0W oil. That may contribute to what you are experiencing.
 
Let me beat all the koolaid drinkers;

1. Impossible (syn IS better PERIOD)
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2. It's quieter due to the sludge forming..
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3. Pennzoil 5w30 syn is not a REAL syn so you really are comparing a conventional vs a conventional.

4. All engines sound better after a oil change.

Personally Pennzoil Conventional is a top notch oil and will protect your engine as well as anything else as long as you follow the recommended OCI.

Take care, bill

PS:
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Saying bad things about PP on this site is a BIG no no and will get you banned from BITOG.
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Just kidding..but like someone else mentioned..PP is on the thin side so you may experience more noise from using it.
 
Bump - ANY oil change can result in an immediate perception change. Maybe the dino is a bit thicker. Or maybe the molecule sizes are spread out and dampen more frequencies compared to the mono- frequency attenuation of the synthetic.
 
I'd say that it's a side effect of your truck having conventional traditional value(s). Now those northern Fords ..
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answer.. it doesnt

funny how combustible topics like this are started by people who joined the same day.

hopefully its some troll's 4th username..

that is getting old.
 
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ANY oil change can result in an immediate perception change.
+1 Not saying you're not noticing a difference now. In my experience after an oil change engine seems smoother and quieter. Give it some time to judge.

Could be smoother/quieter though, but both PYB an PP are good oils.

Not a koolaid drinker for sure. Only in the last year have I ever, in 4 decades, used on sale only, synthetic. But still have plenty of dino in my stash.

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I have a 5.4L but use a premium synthetic oil. Warm weather I use 5W20 and if it's cold I use 0W20. I have no problems except not having any traction starting on damp or salty pavement with new tires. It's all in your heaad.
 
In North Carolina, you will likely get very little benefit from using synthetic vs. dino unless you are interested in longer drain intervals. If it makes you feel better, shoot, run the yellow bottle.
 
To answer your question: conventional oil can be better at times.Because it does not make a greater profit for the oil companies you will never see that in writing.What you felt was true and remember the famous bovine poop is really never proven re. a consumer reports like paper. There was a time only PA. crude did all the things that make you sleep at night. That was bovine in nature now we have a new set of deception.Stick with your gut not some marketing lie.
 
Originally Posted By: Rand
answer.. it doesnt

funny how combustible topics like this are started by people who joined the same day.

hopefully its some troll's 4th username..

that is getting old.


err hopefully its NOT some....

whoops.
 
I find different add packs have a huge effect on sound which is how we percieve how the engine is running. Also viscosity can have a profound effect.It does not always take much of difference to make a big difference.

Mpst synthetics are doing the thin game right now for fuel ecconomy. This combined with less additives total in them then they had just a few years ago amounts to more noise. Noise does not mean wear or improper running. Because Redline has more of everything in just about every SAE viscosity from hths to additives one of the things you always hear is "How Quite the car runs on redline. and How smooth it seems to e running."
 
PP is not a thin oil.
The answer is simple.
Your truck hates you, and is messing with your mind.
Seriously, though, I have seen smoother and quieter operation in our '97 Accord in going from PP 5w30 to PZL YB 10W-40, so it may be that the YB is simply smoother in certain applications.
If you like the way your truck sounds and feels on YB, then I think you have found your ideal oil.
 
Originally Posted By: BumpDraft2004
Recently switched to conventional from synthetic to save a few $$$. I noticed my Ford 5.4 liter runs smoother and just has a "tightger" sound from the engine. I know that is not very scientific but it was there. Any explanations/suggestions? Would the oil used at break-in when the piston grooves were formed have anything to do w/ that?
To save money and get any benefit running syn oil you have to increase the oil change interval.
 
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