Which oil are you using?

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That's prolly ok, but I'd err on the low side and do 1 or 1.5 bottle in the 8 qts. The additive is prolly basing the dilution on a base which has 800 or lower ppm. Most likely, lower. The typical gas engine oil today has around 600-800 ppm. Some may have it completely removed. That's why you need to find the concentration of the additive and the Zn level of the base oil and add accordingly, if you want to get it at the proper levels.

Diesel engine oils generally only have more detergents. Oil in diesel engines gets dirty fast!
 
Spike Strip said:
Again, 1200 to 1300 ppm zinc compounds as most of the above listed oils contain, is not "plenty" of zddp. It's the minimum amount and is rapidly depleted. That's why you need at least 1700 (or more) to start so it's still at the minimum by the time you get around to changing the oil.
Click to expand...
I am not sure about your statement of rapidly depleting ZDDP. See this oil analysis. Looks like the same level of Z and P after 9k miles.
08 Duramax LMM - 9,886 miles - Delo 15W-40 | Used Oil Analysis - Diesel | Bob Is The Oil Guy

You might be thinking of the TBN count. It does decrease throughout the oil life as the oil neutralizes the acids produced within the crankcase.
 
This has been beaten to death so many times it's even worse looking than Madonna.

Run whatever you want that you feel provides adequate protection. :meh:
 
Currently in my trucks: Lucas Magnum 15W-40 (I live in So. Cal.) 1700 ppm and change around 3k or so miles. $25 gal from Amazon.

But just NOW looking at their product wonkery brochure, I see it's now listed as 1524 ppm so next time I buy, I'll be switching to the Classic car flavor. For me, it usually about availability and price.


http://lucasoil.com/pdf/Zinc_Values_MotorcycleOil.pdf
 
Spike Strip said:
Currently in my trucks: Lucas Magnum 15W-40 (I live in So. Cal.) 1700 ppm and change around 3k or so miles. $25 gal from Amazon.

But just NOW looking at their product wonkery brochure, I see it's now listed as 1524 ppm so next time I buy, I'll be switching to the Classic car flavor. For me, it usually about availability and price.


http://lucasoil.com/pdf/Zinc_Values_MotorcycleOil.pdf
Click to expand...



yep. classic car is easily available and at 2100ppm zddp it fits the bill for me.
 
Sharing this sale price @ Costco
$10/gallon 15w-40 Chevron Delo
20170112_173644.jpg
 
Great price there. Perfect Land Cruiser oil. Cheap, plentiful, lots of ZDDP. You can spike it a bit more with the Redline break-in additive.

I used to buy Chevron Supreme 20W-50 for something like $1 per quart and used that for years. And if you sent in the rebates, it was $0.50 a quart.
 
That is a super price. thanks
 
I never noticed this verbiage before from Mobil, but they call out the zinc additive right here on the 15w-50.

IMG_0476.JPG
 
I Just changed the oil in my 88 and used Mobil Delvac 15w-40 and added the zinc additive to it along with a Wix 51773 filter. I read several places online that GM engineers have said its a myth that a additive is needed but Im going to use it! I don't trust GM engineers after having to rebuild countless GM engines and trans.
 
deltapine1 said:
The answers to this long asked question would circle the globe many times if typed end to end on a sheet of paper. As many of us are concerned about how long a F/2F will last I thought it was important to point out the fact that there are not many store bought oils available that contain levels of anti wear additives and friction modifiers which were originally specified for these engines. ZDDP as it is commonly referred to was removed from commercially available motor oils a few years ago as they apparently reduce the catalytic converters ability to reduce emissions.

These newer oils have been cited as causing excessive wear, lifter, and camshaft failure in older flat tappet style engines.

I have been using a Pennzoil 25W50 Racing Oil in all of my older vehicles along with one bottle of Comp Cams Assembly Lube to try to prevent the loss of a camshaft.

Newer roller camshaft motors don't seem to be affected by the lack of ZDDP in the newer oils.

What type of oils/additives are others using in F/2F egines?
Click to expand...
I run brad/penn racing oil in all my junk.
It has high levels of zinc and phosphorus and is a semi-synthetic.
I purchase it from a speed shop in CO springs. Not sure how else to get it.
It is refined and sold in Bradford Penn.
Do you remember Kendall racing oil?
Same oil.
 
So after a lot of reading I think I'm going to go with this combo for the 12ht.

The Lucas Oil 15W-40 Magnum High TBN CI-4 Oil (1524 ppm) with a 16oz bottle of Lucas break in oil.

I think it's a good comprise for the price.
I found it for 18$ a gallon (I need 3 for oil change) at jegs plus 10$ for standard shipping in the states. So figure roughly 21.99$ a gallon with a little left over for next oil change. The cost of the lucas zinc is 16$ on amazon so that bumbs it up to roughly 27$ a gallon....plus the oil filter cost.

Lucas Oil 10076: SAE15W-40 Magnum Motor Oil 1 Gallon | JEGS

I know the Lucas hot rod has 2100ppm but it also 35$ a gallon on amazon.

Has anyone used alternative additives such as Archoil or DRD? They use nanoborate tech and are suppose to have as good if not better than zinc lubricity properties
 
The key to the proper additives seems to be the API rating, which for mine is "SF". To elaborate more:

upload_2017-8-9_12-25-55.png


If there are any other brands that produce "SF" let me know, this is the only one I could find in two minutes of searching.
 
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