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Joined: Jan 2003
Posts: 410
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Jan 2003
Posts: 410 |
I have used the standard 10-30 oil for years in my old chevys . Some are buying 10-40 Rotella and using that in the old engines. They claim it has the additives the engines need that the newer oil doesn't ! What do you think ? Thanks. "I know the answer if I could just think of it ! "
easymoney
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Joined: Nov 2002
Posts: 7,472 Likes: 26
ChatMaster - 7,000
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ChatMaster - 7,000
Joined: Nov 2002
Posts: 7,472 Likes: 26 |
If you have had good luck with what you have been using then I would stick with it. As the saying goes "if it ain't broke, don't fix it".
Steve D
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The additive you are refering to is Zinc or ZDDP.
There is more than enough Zinc in 10W-30 to satisfy the needs in a standard 6 Cyl. engine. In fact much more than what was in oils 50 years ago. The engines that would require more are higher performance V-8 with stronger valve springs due to the use of high-lift camshafts. Also if a new cam was installed in any rebuilt engine. A lot of the new cams are not hardened properly and need all the help they can get.
In that case you can buy QuakerState Defy in 10W-30 as it has extra Zinc and Walmart has it for a reasonable price.
Along with Zinc good oils also have sulfur and Moly added which help to serve the same purpose.
Rotella and other oils designed for Diesel use have had their Zinc content reduced due to Diesels having a converter in the later years. The Sulfur in diesel oils also has been reduced for the same reason sufur has been removed from diesel fuels.
Gene Schneider
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Joined: Jan 2003
Posts: 410
Backyard Mechanic
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OP
Backyard Mechanic
Joined: Jan 2003
Posts: 410 |
easymoney
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Joined: Feb 2014
Posts: 187
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Feb 2014
Posts: 187 |
I'm using 20w non detergent oil in my 39 is that ok?
Thank you,
Twigs
1939 Chevrolet Master Deluxe 4dr sedan
VCCA# 50190
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
I have always used 10W-30 (detergent) in my cars.
Gene Schneider
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Joined: Feb 2014
Posts: 187
Shade Tree Mechanic
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Shade Tree Mechanic
Joined: Feb 2014
Posts: 187 |
I detergent ok to use beings there is no oil filter in my 39
Thank you,
Twigs
1939 Chevrolet Master Deluxe 4dr sedan
VCCA# 50190
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Joined: Jan 2002
Posts: 30,701 Likes: 141
ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
No problem. Just change the oil every Fall or every 1500 miles.
Gene Schneider
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