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Synthetic or Conventional

Houle #382

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What's the best of the two to use in a Hydraulic roller Cam, Synthetic or Conventional oil
 
What's the best of the two to use in a Hydraulic roller Cam, Synthetic or Conventional oil
won't matter.. but i have no issue using synthetic.. when i got tired of wondering which to use i did research and synthetic is still distilled crude oil, just the way it's converted into different types is different, using different chemicals and such.. at the end of the day it's still oil.

That being said.. my motor has Castrol 50w old *** GTX normal oil in it.. my rear end is getting synthetic valvoline.. those choises based on price (and the fact that rear end dope comes in a squeeze bag) :)

This is from Car and Driver:

Yes. Although conventional oil provides adequate lubrication, it doesn't compete with synthetic oil's overall engine protection and performance.

Synthetic oils are created with base oils which are of a higher quality than conventional, less-refined base oils. These higher quality base oils make synthetics:

  • Less likely to acidify and oxidize
  • More chemically stable
  • Harder to break down and lose desired qualities
For example, conventional 5W-30 motor oil is a petroleum-based oil that is thick at low temperatures and thin at high temperatures. To change this variance, oil manufacturers use additives to change the oil's properties, reducing its viscosity at lower temperatures and thickening the oil at higher temperatures. When it's freshly made, conventional 5W-30 motor oil acts like its synthetic counterpart, but over time, the chemical additives break down or vaporize, returning the oil to its original consistency.

By contrast, synthetic oils are designed to match a specific type of multi-grade oil from the beginning. Even without additives, a synthetic 5W-30 motor oil will not degrade or change viscosity—it may only become slightly thicker from contaminants.
 
I always buy the best oil I can for my car, which is syn oil.
It is a small cost in the overall running cost of the car....
 
won't matter.. but i have no issue using synthetic.. when i got tired of wondering which to use i did research and synthetic is still distilled crude oil, just the way it's converted into different types is different, using different chemicals and such.. at the end of the day it's still oil.

That being said.. my motor has Castrol 50w old *** GTX normal oil in it.. my rear end is getting synthetic valvoline.. those choises based on price (and the fact that rear end dope comes in a squeeze bag) :)

This is from Car and Driver:

Yes. Although conventional oil provides adequate lubrication, it doesn't compete with synthetic oil's overall engine protection and performance.

Synthetic oils are created with base oils which are of a higher quality than conventional, less-refined base oils. These higher quality base oils make synthetics:

  • Less likely to acidify and oxidize
  • More chemically stable
  • Harder to break down and lose desired qualities
For example, conventional 5W-30 motor oil is a petroleum-based oil that is thick at low temperatures and thin at high temperatures. To change this variance, oil manufacturers use additives to change the oil's properties, reducing its viscosity at lower temperatures and thickening the oil at higher temperatures. When it's freshly made, conventional 5W-30 motor oil acts like its synthetic counterpart, but over time, the chemical additives break down or vaporize, returning the oil to its original consistency.

By contrast, synthetic oils are designed to match a specific type of multi-grade oil from the beginning. Even without additives, a synthetic 5W-30 motor oil will not degrade or change viscosity—it may only become slightly thicker from contaminants.
That's true except for group III base oils that the US courts ruled were synthetics despite being made from dino oil.
Castrol brought the suit to have their non synthetic oil labeled synthetic because of the extensive refining process their base oils receive.

I was amazed to see a Gale Banks video where the chief oil engineer at Amsoil conceded that some of their synthetics are indeed group III oils not their much herald'd PAO base stocks.

I tried Mobil 1 high mileage in my 272k Buick 3.8 this past January...it was on sale for $20/5 qt jug.

The engine gets 3k oil changes and usually uses about one qt between changes using Federateds house brand 5w30 semi synthetic.

It used 4qts in the 5,000 miles we ran up on our yearly Florida sabbatical.

No more Mobil 1 for that old girl. It will be going down the road anyway this winter having been replaced by a Ford Maverick.
 
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