castrol 20w50
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Postmaster
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From: shepherd
i use 10w30 in all of my non oil burning and leaking cars and trucks. but my friends dad works at napa and says that 20w50 is for high revving engines. so he bought me 5 quarts for taking his el camino to the paint shop for him. should i use it. i live close to houston,texas. and i am going to try to take care of this one better lol
Laughing Gas
Joined: May 2003
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From: Scenic Wisconsin
Not that many years ago, Castrol was telling everyone to use GTX 20W-50 exclusively. Nowadays that's not the case. I think if you wait for that nice warm Houston summer, you won't have any problem using it. After that, I think the other guys are right on - stick with 10W-30.
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From: shepherd
so i guess i will save this stuff until summer which i am still hesitant to use since i have never done it before. i don't run anything more thatn 10w30 and 10w40 and that is on oil burnes. what will this thick oil do to my motor
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A few years back I had a Taurus and used 20W50 in the summer. It did not affect the motor in any bad way.
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Summers in Houston are fine for 20W50. Castrol makes great oil and the price was right for you...
I used to run 20W50 in my '68 Camaro (383 c.i.) in the summers in Oklahoma but would switch to 10W40 in the winter.
Like they said...great for older cars w/higher mileage engines...help keep the leaks down...but will be fine for your car in the summer...
I used to run 20W50 in my '68 Camaro (383 c.i.) in the summers in Oklahoma but would switch to 10W40 in the winter.
Like they said...great for older cars w/higher mileage engines...help keep the leaks down...but will be fine for your car in the summer...
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From: Metro Detroit (Redford)
Since you understandably are not comfortable running straight 20w50, why not run one or two quarts of the stuff mixed with 10w30. I would stay with the same brand for both grades. Four quarts of 10w30 mixed with one 20w50 likely would still give you a 10w30, just a thicker one. Even a ratio of three 10w30s to two 20w50s probably would barely get you to a 10w40, maybe a 15w40. It won't hurt. I ran 2 20w50s mixed with 4 5w30s fine (not normal procedure, just an experiment), just not in sub freezing weather.
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Originally posted by TallPaul
Since you understandably are not comfortable running straight 20w50, why not run one or two quarts of the stuff mixed with 10w30. I would stay with the same brand for both grades. Four quarts of 10w30 mixed with one 20w50 likely would still give you a 10w30, just a thicker one.
Since you understandably are not comfortable running straight 20w50, why not run one or two quarts of the stuff mixed with 10w30. I would stay with the same brand for both grades. Four quarts of 10w30 mixed with one 20w50 likely would still give you a 10w30, just a thicker one.
I have seen many posts like this across the internet but it is simply not possible to better engineer a formulated oil in this manor of mixing . Oil is a science and even more so these days with ever changing additives and the proven synergy of manipulating these additives used together by the chemists that are paid big bucks for their work .
Now it might not hurt to use up that quart of leftover oil on occasion but making it habit is really not the best practice .
If cost is an object I would use Motorcraft 10-40 or one of the several new blends or any available group III synthetic 5-40 in that V6 during Houstons summer where the overnite low is 80F .
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From: Metro Detroit (Redford)
Originally posted by TritonV10
Paul ,
I have seen many posts like this across the internet but it is simply not possible to better engineer a formulated oil in this manor of mixing . Oil is a science and even more so these days with ever changing additives and the proven synergy of manipulating these additives used together by the chemists that are paid big bucks for their work .
Now it might not hurt to use up that quart of leftover oil on occasion but making it habit is really not the best practice .
If cost is an object I would use Motorcraft 10-40 or one of the several new blends or any available group III synthetic 5-40 in that V6 during Houstons summer where the overnite low is 80F .
Paul ,
I have seen many posts like this across the internet but it is simply not possible to better engineer a formulated oil in this manor of mixing . Oil is a science and even more so these days with ever changing additives and the proven synergy of manipulating these additives used together by the chemists that are paid big bucks for their work .
Now it might not hurt to use up that quart of leftover oil on occasion but making it habit is really not the best practice .
If cost is an object I would use Motorcraft 10-40 or one of the several new blends or any available group III synthetic 5-40 in that V6 during Houstons summer where the overnite low is 80F .
Last edited by TallPaul; Feb 4, 2004 at 10:31 AM.
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I have 6 qts of Valvoline 20W50. Would this be ok to use in my truck, its a 91 F150 w/ 302 with 90,000 miles on it. Ofcourse I wont put it in during the winter, we really dont get alot of terribly hot weather here in Ohio. Are there any advantages to 20W50 in a truck like this? Would it be better if I just stuck with my usual Valvoline 10w30?
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From: S/C Texas
I had 20w50 in my Pontiac in Ohio. Never had any problems in the summer time. But I was hurting that motor as much as I could. I cant think of any reason to use 20w50 in a sound motor in Ohio. If you just want a HD oil, you can use a straight 30w. I have a 91 F150 w/ a 302 over 100,000 miles and I use Mobil Drive Clean 30weight year round. I'm very happy with Mobil oil. Its even eating the varnish off the dip stick, after years of lesser oils.
I cant remember the safe pour points of 30w in the winter, but outside of winter months you can use 30w easily. With the winter temps there, I'd stick with your 10w30. Or maybe even a 10w40 year round if you prefered.
I cant remember the safe pour points of 30w in the winter, but outside of winter months you can use 30w easily. With the winter temps there, I'd stick with your 10w30. Or maybe even a 10w40 year round if you prefered.
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From: Metro Detroit (Redford)
Originally posted by Big Yac
I have 6 qts of Valvoline 20W50. Would this be ok to use in my truck, its a 91 F150 w/ 302 with 90,000 miles on it. Ofcourse I wont put it in during the winter, we really dont get alot of terribly hot weather here in Ohio. Are there any advantages to 20W50 in a truck like this? Would it be better if I just stuck with my usual Valvoline 10w30?
I have 6 qts of Valvoline 20W50. Would this be ok to use in my truck, its a 91 F150 w/ 302 with 90,000 miles on it. Ofcourse I wont put it in during the winter, we really dont get alot of terribly hot weather here in Ohio. Are there any advantages to 20W50 in a truck like this? Would it be better if I just stuck with my usual Valvoline 10w30?
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