Consensus on best motor oil?
08-06-2014, 05:22 PM
#16
Rennlist Member
To answer your original question, you will not get a concensus on this subject on this forum...
To answer your question above, Yes. I've been running Mobil 1 15-50 in my GT in the blazing heat of Phoenix for over 14 years and 130k miles and never had an oil related issue. Many (most???) owners on this forum use Mobil 1 15-50.
To answer your question above, Yes. I've been running Mobil 1 15-50 in my GT in the blazing heat of Phoenix for over 14 years and 130k miles and never had an oil related issue. Many (most???) owners on this forum use Mobil 1 15-50.
08-06-2014, 05:55 PM
#17
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i did some research awhile back since i run a variety of sports cars...i have some anecdotal evidence and some research thoughts.
--you cant go wrong with mobil 15-50
--i have noticed that dyno oil will condensate and have more moisture in it over time. i did not have the same evidence with synthetic
--15-50 syn gives great oil pressure and holds it over longer periods of time i.e. many thousands of miles while dyno will thin out more and drop oil pressure as the oil ages.
--synthetic does not mean it is purely lab made....it comes from the same crude stock, but is cut into splices and then a lab reconstructs the carbon molecules to suit its needs and application. i have noticed that through this chemistry it does retain its original qualities better than dyno. especially over longer periods of time.
case in point- i have an older porsche, i ran dyno oil and as the oil ages with various heat cycles, i noticed that idle oil pressures were dropping.
using synthetic for exactly the same time period, i never ever had this occurance.
i am sold on mobil 1 15-50. i use it in all my cars. until you experience it yourself you wont believe it. now if you change your oil every 2 months it wont matter to you as you wont notice it. my point is this syn oil retains the original qualities of viscosity and protection for much longer periods of time vs dyno and there is less moisture in it.
--you cant go wrong with mobil 15-50
--i have noticed that dyno oil will condensate and have more moisture in it over time. i did not have the same evidence with synthetic
--15-50 syn gives great oil pressure and holds it over longer periods of time i.e. many thousands of miles while dyno will thin out more and drop oil pressure as the oil ages.
--synthetic does not mean it is purely lab made....it comes from the same crude stock, but is cut into splices and then a lab reconstructs the carbon molecules to suit its needs and application. i have noticed that through this chemistry it does retain its original qualities better than dyno. especially over longer periods of time.
case in point- i have an older porsche, i ran dyno oil and as the oil ages with various heat cycles, i noticed that idle oil pressures were dropping.
using synthetic for exactly the same time period, i never ever had this occurance.
i am sold on mobil 1 15-50. i use it in all my cars. until you experience it yourself you wont believe it. now if you change your oil every 2 months it wont matter to you as you wont notice it. my point is this syn oil retains the original qualities of viscosity and protection for much longer periods of time vs dyno and there is less moisture in it.
08-06-2014, 06:57 PM
#18
Rennlist Member
In the early 90's oils all got better and you could run a different brand every oil change and not have any problems. The best is to change the oil/filter at the correct intervals and with the correct viscosity for your climate/usage.
08-06-2014, 08:24 PM
#19
Nordschleife Master
IMO the only reason to run synthetic is if you cook your oil (e.g. track work, boost, sitting in slow traffic a lot etc.), otherwise just regular zinc-laden dino oil and regular change intervals.
08-07-2014, 11:24 AM
#21
RL Community Team
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Being new to 928 ownership, I just had this conversation with Carl Fausett of 928 Motorsports last week. He strongly advised me to use a petroleum based oil, not a synthetic, and if I needed to use a synthetic to sleep at night, to use a synthetic blend, not a 100% synthetic.
Here's the email response he sent me,
"Keep in mind how much better the SE-rated mineral oils are today then when your engine was made. An oil like Rotella T is head-and-shoulders better than anything that was available at that time. Oil technology has leaped forward in all types - not just synthetics.
*
On older motors, they still have cork gaskets which swell when contacted by the mineral oil. With synthetics, the cork gaskets dry out, shrink, and we get oil leaks all over (owing also in part to their smaller molecular sturcture as well.)
*
Secondly, the machine tools*and hones of the older motors are not*what the machining grits are today, and you wouldnt be the first guy to report that his 928 didn't*use any oil, and now that he is running synthetics, it burns a qt every 300 miles.* Again, the molecular structure is thinner but longer, and the synthetics get past the rings where the mineral oil does not.
*
Then there is the whole conversation about the over-heated motor....*
*
Anyway - If you must use a synthetic to sleep good at night, use a partial synthetic blend."
I'll be following his advice when it comes to oil for my new steed, since it will also have one of his superchargers in it.
Here's the email response he sent me,
"Keep in mind how much better the SE-rated mineral oils are today then when your engine was made. An oil like Rotella T is head-and-shoulders better than anything that was available at that time. Oil technology has leaped forward in all types - not just synthetics.
*
On older motors, they still have cork gaskets which swell when contacted by the mineral oil. With synthetics, the cork gaskets dry out, shrink, and we get oil leaks all over (owing also in part to their smaller molecular sturcture as well.)
*
Secondly, the machine tools*and hones of the older motors are not*what the machining grits are today, and you wouldnt be the first guy to report that his 928 didn't*use any oil, and now that he is running synthetics, it burns a qt every 300 miles.* Again, the molecular structure is thinner but longer, and the synthetics get past the rings where the mineral oil does not.
*
Then there is the whole conversation about the over-heated motor....*
*
Anyway - If you must use a synthetic to sleep good at night, use a partial synthetic blend."
I'll be following his advice when it comes to oil for my new steed, since it will also have one of his superchargers in it.
08-07-2014, 11:29 AM
#22
Administrator - "Tyson"
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Well now, this thread just grew some legs....... 
On that note.... My friends Corvette race team runs Brad Penn which is non-synthetic based.
Todd's 1,000hp twin turbo uses a non-synthetic oil:
http://products.lelubricants.com/category/20w-50
Aside what Carl said, the #1 advantage to synthetic oils is longevity between oil changes. If you only drive your car 3k-4k miles per year (like I do) then I see no advantage to spending the money on synthetic since I change the oil annually, regardless of miles.
On that note.... My friends Corvette race team runs Brad Penn which is non-synthetic based.
Todd's 1,000hp twin turbo uses a non-synthetic oil:
http://products.lelubricants.com/category/20w-50
Aside what Carl said, the #1 advantage to synthetic oils is longevity between oil changes. If you only drive your car 3k-4k miles per year (like I do) then I see no advantage to spending the money on synthetic since I change the oil annually, regardless of miles.
08-07-2014, 11:53 AM
#23
Drifting
How about that....all well reasoned responses, taking into account how different folks use their cars and evolution of oil technology, were respectfully stated in less than 25 posts. Impressive!
08-07-2014, 01:29 PM
#24
Administrator - "Tyson"
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08-07-2014, 08:50 PM
#27
Electron Wrangler
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Alan
08-07-2014, 09:44 PM
#29
Race Car
Add as sticky? Force review prior to registering to post? Or to existing Newbs stickie? is it in there already?
08-07-2014, 10:17 PM
#30
Nordschleife Master
I've said this before and I'll say it again because I like to say it and this is a new thread on the same topic so I will.
I use synthetics because they clean up so nicely. Whether it's under the car or taking the engine apart, the parts clean up nicely and it doesn't stain the hands and forearms.
Synthetics for road course driving because they're better.
I use synthetics because they clean up so nicely. Whether it's under the car or taking the engine apart, the parts clean up nicely and it doesn't stain the hands and forearms.
Synthetics for road course driving because they're better.