Synthetic or Conventional motor oil

What motor oil do you use

Conventional
14
32%
Synthetic
24
55%
Synthetic Blend
6
14%
 
Total votes : 44

Re: Synthetic or Conventional motor oil

PostBy: lsayre On: Sun Dec 22, 2013 9:25 pm

I doubt that the additives companies would spin their internal testing facts, as they are selling their additives into the entire market, and that includes both conventional and synthetics. Where then would be their motivation to spin anything? They are not selling the oil, but only the additives. They are going to make sales regardless of what the end users consume based on advertising hype or whatever.
Last edited by lsayre on Sun Dec 22, 2013 9:28 pm, edited 1 time in total.
lsayre
 
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Re: Synthetic or Conventional motor oil

PostBy: Rob R. On: Sun Dec 22, 2013 9:27 pm

I am far from an expert in this, but I have used quite a few different products in heavy equipment...conventional oils, synthetic oils, and synthetic blended oils. My experience has been that synthetic oils offer longer drain intervals without compromising engine cleanliness, and starting below zero is noticeably improved. The blended products can perform very well for less money than synthetics...must be the old 80/20 rule.

Most off-the-shelf oils contain additive packages from Lubrizol.
Rob R.
 
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Re: Synthetic or Conventional motor oil

PostBy: KLook On: Sun Dec 22, 2013 9:30 pm

If the conventional was the same in lubrication, then this story about transmissions in low grade autoracing would be false, and I know it isnt. A friend was burning up 3 speed transmissions and could not figure out what to do. He was told to put mobil 1 in it and not only did it not burn up, but he could put his hands on it after a race. Before, it would burn you to touch it. Later, the automakers started using automatic transmission fluid in the manual transmissions. My 93 Ford had it. That is all Dexron is, light synthetic oil.

Kevin

I agree with what has been posted since my last post. I am no engineer either, but have spent some time reading all I can about the subject. Just weird I guess. IF no oil cooler was desired and synthetic oil reduced temps and it follows that temps are created by friction, then I would guess that solves that question.
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Re: Synthetic or Conventional motor oil

PostBy: Rob R. On: Sun Dec 22, 2013 9:32 pm

In the case of the Vette, I believe the Mobil 1 product could simply handle the higher temperatures without breaking down.
Rob R.
 
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Re: Synthetic or Conventional motor oil

PostBy: lsayre On: Sun Dec 22, 2013 9:39 pm

The one thing I did inquire about was the reasoning behind multi viscosity oils vs. single viscosity oils. I.E., 5W-30 vs. straight 30W for example.

5W-30 is a 5 weight base stock oil with viscosity enhancers added to it so at low temperatures it is thin and acts as it should viscosity wise, that being 5 weight, but at high running temperatures it thickens (due to the viscosity additives) and acts like (simulates) a true 30 weight oil viscosity wise at the same running temperature. The consensus that I heard was that a multi viscosity oil will never give the same level of engine protection (at full running temperature) as a good single weight oil will. But a multi-viscosity oil aids a bunch in cold weather starts, and in fuel mileage. The moral of this story is that if you are going to run an engine continuously fast and hard, and cold starts and fuel economy are not major concerns, then run it on a good single weight oil.

The effect looks like this attached pdf file.
Attachments
Viscosity.pdf
(24.05 KiB) Downloaded 3 times
Select:BBcode: [nepafile=47139]Viscosity.pdf[/nepafile]
lsayre
 
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Re: Synthetic or Conventional motor oil

PostBy: Flyer5 On: Sun Dec 22, 2013 11:09 pm

The other reason for running a conventional wax based oil is corrosion protection. If you run everyday then synthetics are great because it allows more mileage less were. If you have an engine that sits unused for long periods it is best to use conventional oil the waxy film stays behind and clings where as the synthetic just slides off. My truck I run Rotella same with my tractor and motorcycle because they may go weeks between use. My car I run synthetic for multiple reasons and will occasionally go 20kmiles but change the filter in between at about 7500miles. I try to plan every 14-15 k miles between. I have 290k miles on the car.
Flyer5
 
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