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07-14-2018, 07:45 AM | #21 | |
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Re: Why is it hard to find 30w oil
Quote:
I use Mobil 1 in my antique and modern vehicles, fwiw. |
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07-14-2018, 08:47 AM | #22 |
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Re: Why is it hard to find 30w oil
The word "detergent" offends the free range snowflakes
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07-14-2018, 09:04 AM | #23 |
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Re: Why is it hard to find 30w oil
The NAPA that I work at has it, in several flavors. Mike
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07-14-2018, 09:10 AM | #24 |
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Re: Why is it hard to find 30w oil
I use 30 wt. non-detergent oil in my '29 Chevy. The motor is original (not rebuilt) and had non-detergent in it when i bought it. My '31 "A" roadster
uses 30 wt. detergent oil. Has an original (not rebuilt, as far as I know) "B" block in it. The Chevy has no filter system with the '31 roadster having one of the "by-pass" filter systems. I was under the impression that non-filtered oiling systems used non-detergent oil. So any contaminants in the oil would drop out into the pan before the oil was recycled back through the engine. And detergent oil suspends any contaminants within the oil so it can be picked up by a filter. I don't know how true these are, but they are what I go bye. I also use STP in both cars. Bob-A |
07-14-2018, 09:15 AM | #25 |
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Re: Why is it hard to find 30w oil
Are you sure Walmart doesn't have it? I recently saw both detergent and non-detergent 30W oil there. Try looking in the lawn mower section and the 4 stroke engine section rather than the auto engine oil aisle. Lowe's and Home Depot I think also have it.
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07-14-2018, 10:17 AM | #26 |
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Re: Why is it hard to find 30w oil
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07-14-2018, 01:40 PM | #27 |
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Re: Why is it hard to find 30w oil
Hmm, strange. TSC has both detergent and non-d in 30w around here. i think Walmart does too as other parts stores. I no longer use it in anything, but, I know I've seen it.
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07-14-2018, 02:25 PM | #28 |
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Re: Why is it hard to find 30w oil
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07-14-2018, 02:42 PM | #29 |
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Re: Why is it hard to find 30w oil
Thirty weight viscosity oil was the thing in 1930. Detergent oil had not been even conceived, let alone invented. Same thing for multi-viscosity. From my perspective you should be using a modern oil. New engines are much more demanding than our old flatheads and lubricating oil technology has moved ahead with those designs. I know it's not a Model A, but I have a '48 F-1. Its owners manual recommends using "Heavy Duty Motor Oil" stating "The heavy duty motor oils contain detergent compounds and tend to hold in suspension the foreign contaminants which normally would deposit on the engine parts." It goes on to say "This term shall be used to designate an oil having proved oxidation stability, bearing corrosion preventive properties, and detergent dispersive characteristics. Oils of this type are generally suitable for use in both high speed Diesel and gasoline engines under heavy-duty service conditions."
Detergent oils were just coming on the market at this time and were considered in the high end of the market. Now, of course, all regular oils are detergent. Detergents in the oil prevent the formation of sludge, which I consider highly desirable. If you pull the dipstick on a modern engine the oil will not show any sludge formation. Wouldn't you like your 4 banger to be like that, too? I use 20W-50 multi-viscosity. Others will have different opinions, but don't fall into the single viscosity trap. Again, following the above logic, modern multi-viscosity oils maintain the desired viscosity over a wide range of temperatures. These were not available in the old days. Then there's the Zinc trap that old-time "gurus" fall into. This has been the subject of much heated discussion. In my opinion there is more than enough zinc and similar additives in modern oils to keep your banger happy. Does a Model A place demands on motor oil that are more severe than a modern high performance automobile engine? JMHO. |
07-14-2018, 03:21 PM | #30 |
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Re: Why is it hard to find 30w oil
I'm with DD931 on most suggestions. I however use 10W-30 Mobil 1 full synthetic. Where I had my short block rebuilt recommends 10W-30 and claimed synthetic is not needed. Recently I drove my Model A to the MAFCA National Convention in Reno, and my engine did not use any oil. Let me ask you this, how much does a full tank of gas cost when you fill up? I filled up last night with 9 gallons and it cost more than the 6 pack of oil I bought at Costco before I filled up with gas. Costco gas where I live is also advertised as Top Tier gas btw. How many tanks of gas are you going to buy in 3,000 miles? I think it's a small amount of money in comparison to the price difference in synthetic and regular detergent oil.
I spent a lot of money on my Model A engine rebuilding it and I intend take as good of care of it as I possibly can. Use what you want for oil, that's my preference. Lastly, I noticed something interesting. On one of those new bottles of oil I bought from Costco reading the label in small fine print states, " Continuous contact with used motor oil has caused skin cancer in laboratory animals". Doesn't say anything about CA or birth defects. |
07-14-2018, 06:40 PM | #31 |
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Re: Why is it hard to find 30w oil
Use the new stuff. Much better and that engine does not care.
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07-14-2018, 08:29 PM | #32 |
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Re: Why is it hard to find 30w oil
O'reillys has 30wt valvoline all the time here.
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07-14-2018, 09:04 PM | #33 | |
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Re: Why is it hard to find 30w oil
Quote:
Modern multi weight detergent oil is way better than non detergent single weight. Most of your engine wear happens at startup. Why would you not want the oil to flow quicker especially on a gravity splash oiling system?
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07-14-2018, 10:15 PM | #34 |
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Re: Why is it hard to find 30w oil
Mike from Florida:
Great article, thanks for sharing.
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07-14-2018, 10:17 PM | #35 |
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Re: Why is it hard to find 30w oil
Hi M2M:
I have looked in all those stores you suggested and they don't have it here in Columbus, Georgia.
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07-14-2018, 10:44 PM | #36 | |
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Re: Why is it hard to find 30w oil
Quote:
You have stated the theory correctly.
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07-14-2018, 10:59 PM | #37 |
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Re: Why is it hard to find 30w oil
Walmart & NAPA have 30W nondetergent oil. If you can't find it on the shelf ask for it.
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07-15-2018, 12:23 AM | #38 |
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Re: Why is it hard to find 30w oil
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