Excessive AP1 Oil Consumption
#31
Yeah, maybe just go to heavier weight oil to hopefully reduce the oil consumption. I remember my Dad had this really old Ford F-100 pickup. We'd used it for hauling all kinds of crap, so it was an original road rat.
Once the oil warmed to operating temp, the oil light would come on at every stop if he used 30W oil. Had to go to 50W and really let the thing warm up, on cold days. But, the oil light stopped coming on and oil consumption significantly reduced. Man, those cast iron V8 engines lasted forever. I don't think he ever rebuilt that engine. Sold it for $500, in the 80s.
Once the oil warmed to operating temp, the oil light would come on at every stop if he used 30W oil. Had to go to 50W and really let the thing warm up, on cold days. But, the oil light stopped coming on and oil consumption significantly reduced. Man, those cast iron V8 engines lasted forever. I don't think he ever rebuilt that engine. Sold it for $500, in the 80s.
But, be careful about running higher weight oil in this car. With the way it is designed to run and be driven, I would prefer putting in more oil than running a higher weight and possibly sacrificing oiling performance.
#32
10/40 works fine/safe in this engine and would be as high a viscosity as I would go.
I would still consider replacing the valve seals just because it may solve some of the oil consumption and can be done for around $400- $600 tops. So you have to decide if its worth that money to find out or keep running it as is.
I would still consider replacing the valve seals just because it may solve some of the oil consumption and can be done for around $400- $600 tops. So you have to decide if its worth that money to find out or keep running it as is.
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Live Fast (09-02-2020)
#33
Engine lubrication depends on oil flow, not oil sitting on the surfaces. Oil that's too thick will not flow to spec. 10W-30 and 5W-40 grades are the specified oils for this car. The upper number is what we're concerned about here. I'd also not go thicker than 40 grade. The lower number helps on startup.
Had an engine oil analysis? This will show what, if anything, is wearing abnormally. Visit Blackstone Labs and request their free oil bottle. I think the actual analysis is under $30 and they have a nice database on S2000 engines.
-- Chuck
Had an engine oil analysis? This will show what, if anything, is wearing abnormally. Visit Blackstone Labs and request their free oil bottle. I think the actual analysis is under $30 and they have a nice database on S2000 engines.
-- Chuck
#34
Engine lubrication depends on oil flow, not oil sitting on the surfaces. Oil that's too thick will not flow to spec. 10W-30 and 5W-40 grades are the specified oils for this car. The upper number is what we're concerned about here. I'd also not go thicker than 40 grade. The lower number helps on startup.
Had an engine oil analysis? This will show what, if anything, is wearing abnormally. Visit Blackstone Labs and request their free oil bottle. I think the actual analysis is under $30 and they have a nice database on S2000 engines.
-- Chuck
Had an engine oil analysis? This will show what, if anything, is wearing abnormally. Visit Blackstone Labs and request their free oil bottle. I think the actual analysis is under $30 and they have a nice database on S2000 engines.
-- Chuck
If you want to try Amsoil it seems to have the best sheer strength and resistance to burning off, I forget the scientific term for it.
Performing a valve adjustment then leakdown testing the engine will show where your issue lies. If you have above 15% leak down in one cylinder through the crankcase it's most likely the rings or the cylinder liner
With some LS style engines we have played with we also had luck using a small amount of Marvel Mystery oil squirted ontop of the piston and turning the engine over a few times before sitting for a day and starting. It will smoke for a bit but the day after when cold we noticed less leakdown and a bump in compression. It might help or not.
We didn't perform hot tests since it's a PITA on LSx engines
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windhund116 (09-02-2020)
#35
Yes, just as Chuck says the "Cold weather" weight for the oil is probably the one to use to see if consumption gets better. From standard 10W30 the 5W-40 oil will be less thick on start ups. You should never increase this number unless the engine builder/OEM specify a track oil weight which usually they don't recommend on the street. The 5W-40 will just be slightly thicker when at operating temperature.
If you want to try Amsoil it seems to have the best sheer strength and resistance to burning off, I forget the scientific term for it.
Performing a valve adjustment then leakdown testing the engine will show where your issue lies. If you have above 15% leak down in one cylinder through the crankcase it's most likely the rings or the cylinder liner
With some LS style engines we have played with we also had luck using a small amount of Marvel Mystery oil squirted ontop of the piston and turning the engine over a few times before sitting for a day and starting. It will smoke for a bit but the day after when cold we noticed less leakdown and a bump in compression. It might help or not.
We didn't perform hot tests since it's a PITA on LSx engines
If you want to try Amsoil it seems to have the best sheer strength and resistance to burning off, I forget the scientific term for it.
Performing a valve adjustment then leakdown testing the engine will show where your issue lies. If you have above 15% leak down in one cylinder through the crankcase it's most likely the rings or the cylinder liner
With some LS style engines we have played with we also had luck using a small amount of Marvel Mystery oil squirted ontop of the piston and turning the engine over a few times before sitting for a day and starting. It will smoke for a bit but the day after when cold we noticed less leakdown and a bump in compression. It might help or not.
We didn't perform hot tests since it's a PITA on LSx engines
Remember, my story is based on 60 year old cast iron US V8 technology. Just an anecdotal tale. For his AP1 S200, I'd prolly go to 10W-40. And really check the dipstick.
Last edited by windhund116; 09-02-2020 at 04:02 PM.
#36
Yeah, in hindsight I probably wouldn't either. I wanted to see if the "good stuff" would make a difference to the consumption as compared to the stuff you can get at walmart.
#37
I am not all that convinced Amsoil is that much more "good stuff" than many other oils in practical application. Their sales folks are like snake oil salesman and have come up with some great lines of shit. I have known a couple of them lol. I have used it in the past, but honestly do not think it is worth spending the extra money. There is a LOT of hype in the oil industry! They can point to numbers that seem better, but is it really going to show up in any sort of actual results in the use case it is intended for? I mean, we see this all the time in engineering and product development. "Over-engineered" many times mean no usable benefit other than on paper and more cost to the end user. If it meets the requirements of its intended use, it many times means nothing at all for it to "exceed" those requirements if you know what I mean. In some instances this is not the case, but in many it is.
#38
Registered User
I am not all that convinced Amsoil is that much more "good stuff" than many other oils in practical application. Their sales folks are like snake oil salesman and have come up with some great lines of shit. I have known a couple of them lol. I have used it in the past, but honestly do not think it is worth spending the extra money. There is a LOT of hype in the oil industry! They can point to numbers that seem better, but is it really going to show up in any sort of actual results in the use case it is intended for? I mean, we see this all the time in engineering and product development. "Over-engineered" many times mean no usable benefit other than on paper and more cost to the end user. If it meets the requirements of its intended use, it many times means nothing at all for it to "exceed" those requirements if you know what I mean. In some instances this is not the case, but in many it is.
if i'm not mistaken, they obtain their base oil probably from Exxon-Mobil, and their additive package comes from a popular additive company as well. their expertise is in marketing.
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windhund116 (09-11-2020)
#39
Yes the hard, cold fact is there are very few companies refining or synthesizing the base products. Additives is where the market varies.
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