Mixed oils!
05-01-2009, 08:19 AM
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Mixed oils!
hey guys whats up, today i changed my oil. my problem is i put 5qts of 10w30 and by mistake my brother put a little less than 1/8qt of 5w30. its the same brand oil but different viscosity. am i in the clear or should i change it?
05-01-2009, 08:29 AM
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Gawd that´s it! Your engine is gone! Just donate it to me! 
j/k!
I am definitely no expert, but I would say that 1/8qt on 5qt should not make a whole lot of a difference.
Experts chime in and enlighten us on this topic please.
C.
j/k!I am definitely no expert, but I would say that 1/8qt on 5qt should not make a whole lot of a difference.
Experts chime in and enlighten us on this topic please.
C.
05-01-2009, 08:34 AM
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There's no expertise needed. The oils will dilute in to eachother, specially with such a small amount. If you want to be sure and ease your mind, just check your oil at 1500 miles and maybe change it at 3000 miles. I change mine at 3500.
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05-01-2009, 09:44 AM
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but shouldent be a problem with the oil. and why are you not using the recommended 5w30 for all your oil?
05-01-2009, 10:06 AM
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i was told by a good friend of mine who is a car enthusiast that using 10w30 is fine because i live in miami and since its soo hot and humid, 10w30 is fine. is this an accurate statement? also, the reason why i went with 10w30 is because me and my brother were going to orlando to look at some properties. i had a case of 5w30 for and he had a case of 10w30 for him. he, by mistake, put my case of amsoil 5w30 in his car and had a little left over. so i phoned my friend and he said it was fine to use the 10w30. so by mistake, when my brother was helping me, he put in some of the 5w30 that was left over from his oil change. im actually typing this from my phone because we're already in orlando and i was in a binge and needed to do an oil change before leaving.
Last edited by krypto; 05-01-2009 at 10:14 AM.
05-01-2009, 11:12 AM
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I personally would never run a 10W oil in my vehicle regardless of the climate. The 10W30 will protect just as well as the 5W30 at operating temps but will be thicker when the engines cold, since most engine wear occurs at start-up it's beneficial to have an oil that flows better in a cold engine. I just actually switched to 0W40 for that very reason.
05-01-2009, 11:57 AM
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I personally would never run a 10W oil in my vehicle regardless of the climate. The 10W30 will protect just as well as the 5W30 at operating temps but will be thicker when the engines cold, since most engine wear occurs at start-up it's beneficial to have an oil that flows better in a cold engine. I just actually switched to 0W40 for that very reason.
530 is good for winter, 1030 for summer on a stock motor. Built with turbos, 1040 or thicker.
05-01-2009, 07:48 PM
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Why not, i ran 1040 in my built motor with the TN kit. You dont want 530 if you race. The heat would just turn that 530 into water thin. Thats no good. Thats why race engine oil is usually 1550 or higher, Diesel type.
530 is good for winter, 1030 for summer on a stock motor. Built with turbos, 1040 or thicker.
530 is good for winter, 1030 for summer on a stock motor. Built with turbos, 1040 or thicker.
5W30 will generally protect the engine better than 10W30 in both the winter and summer months. Both will thin down to the same viscosity (30 weight) at operating temperature however the 5W will be a little thinner than the 10W at start-up, allowing it to be spread through the engine more quickly and efficiently. For this reason, as well as 10W40 may have protected your engine, 0W40 would probably have been a little better.
Race oil is engineered for a different purpose and is generally considered to be a poor choice for use in street vehicles. Race engines are driven hard but aren't subjected to the frequent start-ups like a commuter vehicle is. The focus when formulating race oil is solely on how well it stands up to abuse in a hot engine without as much attention given to how well it protects at start-up.
05-02-2009, 06:28 AM
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But either way, i dont think 530 and 1030 will make much of a difference at startup. They will both travel the same. I was just stating that if he races the car on a road course or anything, just use thicker oil so it doesnt wash off your internals like water.
05-03-2009, 07:33 AM
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And did you ever send your used oil out for analysis to see how well it was protecting your engine?
5W30 will generally protect the engine better than 10W30 in both the winter and summer months. Both will thin down to the same viscosity (30 weight) at operating temperature however the 5W will be a little thinner than the 10W at start-up, allowing it to be spread through the engine more quickly and efficiently. For this reason, as well as 10W40 may have protected your engine, 0W40 would probably have been a little better.
Race oil is engineered for a different purpose and is generally considered to be a poor choice for use in street vehicles. Race engines are driven hard but aren't subjected to the frequent start-ups like a commuter vehicle is. The focus when formulating race oil is solely on how well it stands up to abuse in a hot engine without as much attention given to how well it protects at start-up.
5W30 will generally protect the engine better than 10W30 in both the winter and summer months. Both will thin down to the same viscosity (30 weight) at operating temperature however the 5W will be a little thinner than the 10W at start-up, allowing it to be spread through the engine more quickly and efficiently. For this reason, as well as 10W40 may have protected your engine, 0W40 would probably have been a little better.
Race oil is engineered for a different purpose and is generally considered to be a poor choice for use in street vehicles. Race engines are driven hard but aren't subjected to the frequent start-ups like a commuter vehicle is. The focus when formulating race oil is solely on how well it stands up to abuse in a hot engine without as much attention given to how well it protects at start-up.
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