Best Oil for the buck?
05-17-2007, 11:58 PM
#31
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From what I have read in past threads it seems you are pretty safe with Valvoline or Castrol for a daily driver. I am curious what are the opinions of additives like Lucas mentioned earlier.
I use Castrol high mileage with over 150k mi
I use Castrol high mileage with over 150k mi
05-18-2007, 02:59 AM
#34
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Originally Posted by billindenver
Oil is not made for the lubrication you are thinking of LFA951....this kind goes in the car 6 or 7 quarts at a time.
05-18-2007, 08:44 AM
#35
Drifting
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Originally Posted by billindenver
Oil is not made for the lubrication you are thinking of LFA951....this kind goes in the car 6 or 7 quarts at a time.
05-18-2007, 01:34 PM
#36
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as far as people making claims that the viscosity of synthetic oil is thinner or lower than conventional oil with the SAME VISCOSITY rating seems rather rediculous. I think many of you are overlooking the fact that synthetic oil has the ability to withstand higher temperatures without breaking down and losing viscosity. If you were to test the viscosity of 20w-50 Castrol or Valvoline after a thousand miles of use and compare it to a synthetic oil after the same amount of use, which do you think will flow better and have the ability to find more leaks? There is no question that the synthetic oil will have maintained its original chemical properties better than a conventional oil. Also, take a look at the difference in oil pressure at full operating temp. when comparing conventional to synthetic.
To get back to the point however, if I had to use conventional oil I would stick with Castrol.
To get back to the point however, if I had to use conventional oil I would stick with Castrol.
05-18-2007, 01:45 PM
#37
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Originally Posted by badass951
as far as people making claims that the viscosity of synthetic oil is thinner or lower than conventional oil with the SAME VISCOSITY rating seems rather rediculous. I think many of you are overlooking the fact that synthetic oil has the ability to withstand higher temperatures without breaking down and losing viscosity. If you were to test the viscosity of 20w-50 Castrol or Valvoline after a thousand miles of use and compare it to a synthetic oil after the same amount of use, which do you think will flow better and have the ability to find more leaks? There is no question that the synthetic oil will have maintained its original chemical properties better than a conventional oil. Also, take a look at the difference in oil pressure at full operating temp. when comparing conventional to synthetic.
To get back to the point however, if I had to use conventional oil I would stick with Castrol.
To get back to the point however, if I had to use conventional oil I would stick with Castrol.
05-18-2007, 02:07 PM
#38
Race Director
Our engines run perfectly fine on sythetics.
The reason NOT to use syntheitcs on older engines is that they are more prone to leakage. There are many places on a old engine where there is a very small leak where the dino oil does not really leak. Syn's often start leaking at these places. Also when you do have a small leak syn oils tend to leak more. Reasons why have to do with properties of the Syn oil and how it reacts with old crusted seals. However if you have fresh seals an no hints of oil leak syn's work great.
As stated earlier
in my 951 130k mile motor I use VR1 20w50. It has a pan gasket leak and leaks less with this oil than a mobil 1. The leak has been tolerable for few years in VR1, but would have be a must fix years ago with M1. Once fixed I might try M1 and if any other weak spots leak.
My 944 spec race motor was resealed completely with 140k on it. I has run M1 15w50 and now AMSOIL 20w50. No oil leaks of note over years of use.
The reason NOT to use syntheitcs on older engines is that they are more prone to leakage. There are many places on a old engine where there is a very small leak where the dino oil does not really leak. Syn's often start leaking at these places. Also when you do have a small leak syn oils tend to leak more. Reasons why have to do with properties of the Syn oil and how it reacts with old crusted seals. However if you have fresh seals an no hints of oil leak syn's work great.
As stated earlier
in my 951 130k mile motor I use VR1 20w50. It has a pan gasket leak and leaks less with this oil than a mobil 1. The leak has been tolerable for few years in VR1, but would have be a must fix years ago with M1. Once fixed I might try M1 and if any other weak spots leak.
My 944 spec race motor was resealed completely with 140k on it. I has run M1 15w50 and now AMSOIL 20w50. No oil leaks of note over years of use.
05-18-2007, 02:11 PM
#39
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Originally Posted by reno808
But you have to look that our engines were made in the 80's and they were not intended to use synthetic oils.
Model Year:
1984 - on
Only hydrocracked or synthetic oils are now approved by Porsche.
The engine oil is not only a lubricant, but also fulfills many functions at the same time such as component cooling, component cleaning, and protection from corrosion. To be able to fulfill this task, the oil contains specially-developed additives. Mineral oils are extracted directly from crude oil. Using a series of chemical processes, these oils can be further refined (hydrocracked oils) or completely transformed (synthetic oils). These oils provide a higher level of performance than pure mineral oils.
05-18-2007, 02:34 PM
#41
Drifting
I use Mobil1 15-50 synthetic in my turbo and Motomaster (canadian tire) 20-50 synthetic blend in my n/a. I had a big leak problem when I first switched to mobil1 in the turbo, once that leak was fixed though it consumes very little oil.
I am searching for a new oil since they changed the formula for mobil1 and my old stock is running out. What are the options for higher viscosity synthetics nowadays? Amsoil, anything else?
I am searching for a new oil since they changed the formula for mobil1 and my old stock is running out. What are the options for higher viscosity synthetics nowadays? Amsoil, anything else?
05-18-2007, 04:07 PM
#42
Drifting
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Originally Posted by JustinL
I use Mobil1 15-50 synthetic in my turbo and Motomaster (canadian tire) 20-50 synthetic blend in my n/a. I had a big leak problem when I first switched to mobil1 in the turbo, once that leak was fixed though it consumes very little oil.
I am searching for a new oil since they changed the formula for mobil1 and my old stock is running out. What are the options for higher viscosity synthetics nowadays? Amsoil, anything else?
I am searching for a new oil since they changed the formula for mobil1 and my old stock is running out. What are the options for higher viscosity synthetics nowadays? Amsoil, anything else?
05-18-2007, 05:53 PM
#43
There was a recent post about using diesel oil since some new API approved oils are missing the zinc and other additives it used to have. It appears that using diesel oil over time may cause catalytic converter troubles, though. I always thought valvoline was known for having higher detergent properties but it sounds like castrol is also pretty good. Anybody know anything about the LE(low emission) Delvac diesel oil as far as the LE part meaning it would be less prone to causing cat. conv. troubles?
05-18-2007, 06:00 PM
#44
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Recently I've been using ELF synthetic. It's the ELF EXCELLIUM LDX 5W40 and is recommended by Porsche.
I also use Castrol Syntec and Amsoil.
I also use Castrol Syntec and Amsoil.
05-18-2007, 06:40 PM
#45
Drifting
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Originally Posted by The DareDevil
Recently I've been using ELF synthetic. It's the ELF EXCELLIUM LDX 5W40 and is recommended by Porsche.
I also use Castrol Syntec and Amsoil.
I also use Castrol Syntec and Amsoil.