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Old 09-12-2019, 04:18 PM
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Lucas SEMI synthetic for trans and transfer??

I was shopping for oil to service the auto transmission and transfer case in an 08. I’m not loyal to any brand. The auto parts store I walked into happened to sell Lucas - a good brand, so I’ve heard. When I got to checkout I noticed that it is SEMI synthetic ATF. I asked about this and they said it “would be fine” - would mix with the old ATF, give good protection etc. As it was the only ATF they had in stock and it is Lucas, I bought it. (Lucas does make full synthetic ATF but only in 5 gallon pails).

After, I called and talked to a Lucas rep. They also said it would be “fine”. Wouldn’t need to be changed any sooner than a full synthetic, mixes with the old, takes lots of heat before breaking down (but they did admit not as much as full synthetic) etc.

I’m wondering though if I should keep shopping. Should I believe that it’s last as long and protects as well as full synthetic?

I’m in no big rush to change it and definitely don’t want to be doing this again any time soon.

What do you think?

Thanks

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Old 09-13-2019, 07:32 AM   #2
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My opinion, for whatever its worth - I am just some guy on the internet after all - is that oil is disposable. That is, while this oil may not be as good as a full synthetic, I would probably go ahead and run it for a cycle anyway since you have it. You will be changing it again in the future and can put in better oil at that time, if you feel the need. Does that make any sense?

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Old 09-13-2019, 11:09 AM   #3
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Unless I know I am putting in better than factory, I just use factory.
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Old 09-13-2019, 12:10 PM
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Is there better ATF+4 than factory?
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Old 09-13-2019, 12:17 PM   #5
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Nowadays, pretty much all oils, mineral, semi-synthetic,and full synthetic, will mix and be compatible.
I prefer full synthetic, but would have no issues using a semi-synthetic. I am not a fan of Lucas, but I also would have no issues using Lucas if that was what was available. Their oil will likely be every bit as good as anyone else's.
I used Castrol ATF+4 in the transfer case last time (a manual, so only in the TC). It works. Would I also be fine using Lucas? Sure. I think many people worry more about this sort of thing than the actual reality of it warrants.
I really doubt what came in it from the factory is better than the Lucas you bought, or the Castrol I bought. More than likely the aftermarket stuff is a little higher quality. But clearly either will be fine. Hence, we tend to worry about this sort of stuff more than it warrants.
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Old 09-13-2019, 01:47 PM
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Thanks - I agree that all the argument about what might or might not be good seems to be a bigger deal than it needs to be.

The only part that really threw me with the Lucas was that it is SEMI synthetic. Maybe that is just fine but Lucas couldn’t give me a good reason why they make this ATF as a SEMI - maybe it’s a cost thing. Either way I’m going to take it back and find a name brand full synthetic.
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Old 09-13-2019, 02:11 PM   #7
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Originally Posted by Frznrth View Post
Thanks - I agree that all the argument about what might or might not be good seems to be a bigger deal than it needs to be.

The only part that really threw me with the Lucas was that it is SEMI synthetic. Maybe that is just fine but Lucas couldnít give me a good reason why they make this ATF as a SEMI - maybe itís a cost thing. Either way Iím going to take it back and find a name brand full synthetic.
Being Semi-Synthetic just means it was made less expensively. But it should work fine. If you want a full synthetic, buy and use full synthetic. I do. But that is because I would rather use a higher quality oil and change it less often. If you change the oil / trans fluid more often a full synthetic is a waste of money. Both do the same thing, but the full synthetic should last longer.
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Old 09-13-2019, 02:42 PM   #8
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Full synthetic. Always. It's really cheap insurance.
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Old 09-13-2019, 04:48 PM
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I found and bought some Castrol
full synthetic ATF+4 at a Napa store.

While I was at it I bought Napa’s house brand gear oil (made by Valvoline) on sale for 1/2 the cost of the Lucas. Castol’s ATF was also cheaper than Lucas.

While even the most costly fluids are way cheaper than a repair, I’m fairly confident that what I ended up buying will be enough protection - hopefully.

Thanks for all the help.
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Old 09-13-2019, 04:57 PM   #10
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Quote:
Originally Posted by Frznrth View Post
I found and bought some Castrol
full synthetic ATF+4 at a Napa store.

While I was at it I bought Napaís house brand gear oil (made by Valvoline) on sale for 1/2 the cost of the Lucas. Castolís ATF was also cheaper than Lucas.

While even the most costly fluids are way cheaper than a repair, Iím fairly confident that what I ended up buying will be enough protection - hopefully.

Thanks for all the help.
Glad you are happy. I am 100% confident that any of the fluids you bought, including the Lucas stuff, would have been fine.
But that you are now happy is good.
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Old 09-13-2019, 05:31 PM   #11
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Quote:
Originally Posted by Frznrth View Post
I found and bought some Castrol
full synthetic ATF+4 at a Napa store.

While I was at it I bought Napaís house brand gear oil (made by Valvoline) on sale for 1/2 the cost of the Lucas. Castolís ATF was also cheaper than Lucas.

While even the most costly fluids are way cheaper than a repair, Iím fairly confident that what I ended up buying will be enough protection - hopefully.

Thanks for all the help.
I'm sure it will offer plenty of protection, I can't see any name brand full synthetic not meeting the manufacture requirements.

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