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Semi-synthetic vs mineral #5321333 01/13/20 08:10 AM
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Espada Offline OP
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If a 15w50 semi synthetic and a 15w50 mineral oil which will have a better flow rate and high temperature tolerance

Re: Semi-synthetic vs mineral [Re: Espada] #5321337 01/13/20 08:14 AM
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kschachn Offline
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"Flow rate" is not relevant, the winter rating for both is identical and both will be pumped within the limits of the winter rating. That's what the winter rating on an oil is for.

As for the second question that depends on the base stock composition. What brands of mineral and synthetic are you asking about? Is your engine overheating so you are concerned about unusually high oil temperatures?

Based on your other threads I thought your problem was consumption?


1994 BMW 530i, 251K
1996 Honda Accord, 280K
1999 Toyota Sienna, 430K
2000 Toyota ECHO, 284K
Re: Semi-synthetic vs mineral [Re: Espada] #5321341 01/13/20 08:19 AM
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RDY4WAR Offline
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The syn-blend 15w-50 would have better high temperature tolerance due to the addition of 10-40% group III and most likely less VII. You probably wouldn't notice a performance difference between them below about 240*F oil temp.

As far as "flow rate" goes, they are the same oil grade and thus similar enough in viscosity that you wouldn't see a difference. Pumpability and minimum film thickness are what's important.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Semi-synthetic vs mineral [Re: Espada] #5321360 01/13/20 08:46 AM
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Espada Offline OP
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Yeah i have oil consumption issues but recently the battery died and i think the culprit is the heavy oil treatment and wanna switch to 15w50 and thinking about mannol favorit or shell hx5

Re: Semi-synthetic vs mineral [Re: Espada] #5321371 01/13/20 09:02 AM
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kschachn Offline
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You think your oil killed your battery??

This is beginning to sound like one of those threads where little dribbles of info and questions just keep going on forever.


1994 BMW 530i, 251K
1996 Honda Accord, 280K
1999 Toyota Sienna, 430K
2000 Toyota ECHO, 284K
Re: Semi-synthetic vs mineral [Re: kschachn] #5321380 01/13/20 09:09 AM
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Espada Offline OP
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Originally Posted by kschachn
You think your oil killed your battery??

This is beginning to sound like one of those threads where little dribbles of info and questions just keep going on forever.

Doesn't heavy oil treatment affect battery?

Re: Semi-synthetic vs mineral [Re: Espada] #5321385 01/13/20 09:12 AM
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kschachn Offline
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Originally Posted by Espada
Doesn't heavy oil treatment affect battery?

Doesn't your alternator work?


1994 BMW 530i, 251K
1996 Honda Accord, 280K
1999 Toyota Sienna, 430K
2000 Toyota ECHO, 284K
Re: Semi-synthetic vs mineral [Re: kschachn] #5321393 01/13/20 09:28 AM
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Espada Offline OP
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Originally Posted by kschachn
Originally Posted by Espada
Doesn't heavy oil treatment affect battery?

Doesn't your alternator work?

I think it does 😅

Re: Semi-synthetic vs mineral [Re: Espada] #5321401 01/13/20 09:37 AM
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RDY4WAR Offline
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The only time a heavy oil treatment could possibly have an impact on the battery would be in extreme cold temperatures when the oil is too thick to pump effectively and puts a strain on the starter (and therefore the battery) to crank over the engine. I doubt you have that issue in Egypt.


"He who is without oil, shall throw the first rod." - Compressions 9:1
Re: Semi-synthetic vs mineral [Re: Espada] #5321407 01/13/20 10:02 AM
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PimTac Offline
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There is something about this thread that makes no sense at all.


2017 Mazda CX5
Valvoline Advanced Synthetic 0w20
Roki OEM filter.
Re: Semi-synthetic vs mineral [Re: PimTac] #5321408 01/13/20 10:03 AM
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4WD Online Confused
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The title ?

Re: Semi-synthetic vs mineral [Re: RDY4WAR] #5321409 01/13/20 10:03 AM
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Triple_Se7en Offline
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Originally Posted by RDY4WAR
The only time a heavy oil treatment could possibly have an impact on the battery would be in extreme cold temperatures when the oil is too thick to pump effectively and puts a strain on the starter (and therefore the battery) to crank over the engine. I doubt you have that issue in Egypt.


hahahaha

The last time my battery died in Egypt, I hopped on a Camel Uber.

Last edited by Triple_Se7en; 01/13/20 10:04 AM.

19' Hyundai Santa Fe 2.4 GDI - Valv Adv. 5w30 / OEM Oil Filter / 6oz Liqui-Moly
20' Kia Soul X-Line 2.0 Multi-port / Pennzoil Gold 5W30 / OEM filter
04' Colorado 3.5 Castrol Edge 0W40 / K&N filter
Re: Semi-synthetic vs mineral [Re: 4WD] #5321415 01/13/20 10:10 AM
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Originally Posted by 4WD
The title ?




By Jove I think you got it.


2017 Mazda CX5
Valvoline Advanced Synthetic 0w20
Roki OEM filter.
Re: Semi-synthetic vs mineral [Re: Espada] #5321553 01/13/20 12:39 PM
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DGXR Offline
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If you are using a suitable viscosity, your engine oil will have zero effect on your battery life. Even if you are not using a suitable viscosity, the small difference in cranking times will have zero effect on your battery. As RDY4WAR noted, only a combination of very low temperatures and a heavier viscosity could ever allow the motor oil to affect battery life... and that would be really severe circumstances. The alternator is designed to recharge the battery after a heavy draw from the starter motor.


1995 Corvette coupe LT1 6-speed
2006 Tacoma 2.7 Base SR5 AC
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Re: Semi-synthetic vs mineral [Re: DGXR] #5321574 01/13/20 01:02 PM
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Espada Offline OP
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Originally Posted by DGXR
If you are using a suitable viscosity, your engine oil will have zero effect on your battery life. Even if you are not using a suitable viscosity, the small difference in cranking times will have zero effect on your battery. As RDY4WAR noted, only a combination of very low temperatures and a heavier viscosity could ever allow the motor oil to affect battery life... and that would be really severe circumstances. The alternator is designed to recharge the battery after a heavy draw from the starter motor.

Okay thanks i went to check on the alternator and it had some issues plus a new battery installed, now which oil should i go with semi-synthetic or mineral 15w50 instead of 20w50 in winter

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