wowed777

Has anyone used oil additives such as some of the new anti friction stuff they sell? I'm not talking zink for flat lifters, I thinking stuff like archoil. Is it good for a 1973 engine! What are the pros and cons?

DUB

I will say this... when additives are added to oil. You have to assume that it changes the oils properties in some manner. Maybe for the better...maybe not. And if the oil you use along with the additive you have chosen has not been tested...then it is all a guessing game.

DUB

resdoggie

If you need oil an additive, you probably need a rebuild.

Mr D.

Oil additives = Snake Oil

Throw in 5qts of Mobil Delvac 1300 and call it a day.

Cool95vette

I don't t think these additive companies have any better technologies than the multibillion dollar oil companies with nearly unlimited resources.

Wrecked82

Diesel oil will kill a catalytic converter over time. Be ready to replace or remove.

calwldlife

some additives are good.
some you can't quantify.
are you talking treatments like slick 50?
or some of the new block soaking type stuff?

what are you after?

years ago my cadillac dealer was offering an engine oil treatment that coats the metal. they even had a warranty.

gas oil makers are going to put in as little as possible to pass whatever standard they adhere to.

i think everyone knows new oil is lacking in zddp stuff.
techron has a good rep in the gm world.

vetteguy75

Everytime I change my oil, I add one bottle of STP Oil Treatment to the fresh oil (Lucas 10W30 Hot Rod Oil w/extra zinc). Anyway, I've been doing that since 1970 (48 years ago) and have had ZERO problems with my engines.....

Mr D.

Cut that off too.

doorgunner

FYI: In the late 1960s the evening news showed a clip about the Houston Police Dept. using a "new synthetic oil".....after 50,000 miles the patrol car engines being tested were disassemble and showed practically no wear/along with the Officers stating that there was a 3-4 mpg increase in City Driving conditions.

(You can guess what happened to the patent after that)

wowed777

Yes...I was thinking about the block soak stuff. I am not trying to fix any issue, but provide the best maintence for my 45 year old engine.

wowed777

Thanks for all the responses. What I heard is:

On one hand, big oil wants to put in as little as possible to make their product passable, to stay inexpensive. On the other hand, what would these additives have that billion dollar big oil company's don't already know and have in their oil.

Has any body used these? I'm leaning toward just using quality oil and not adding this extra stuff. I was almost sold on "this could be even better for my engine then just plain oil", but why take the chance - right?

DUB

I use AMSOIL in my shop. On the older cars with or without catalytic converters. I use the Z-rod oil. I use the 10w-30 and the 20w-50. 1 year/5000 mile oil change interval.

All I am going to say is look at post #50 and 51. I am not here to push anything on you...or sell you anything. Better yet. Call AMSOIL or any oil company and talk with them with your concerns on trying to put the best oil you can in your engine. Because having the best oil you feel will work for you is great...but if the oil filter is ..as some feel...out dated...then it is was it is.

https://www.corvetteforum.com/forums...nthetic-3.html

DUB

FINWOLF

this is what I use

resdoggie

Any oil with an SM designation will work - dino or synthetic. If you have a flat tappet cam, you will need zddp in the oil. Synthetic will provide better protection under hard driving and will extend oil change intervals. No need to use any additional additives if the oil you choose already has them.

VERYSOON

DUB
I also use Amsoil Z-rod, mainly due to your advice, in my 69 350. Under what condition would you choose to use 20w50 rather than 10w30?
High mileage engine perhaps?
Thanks
VS

calwldlife

other than passing exposure to advertising about
block metal treatments i have no experience or
opinion.

it is enough to worry about zddp and flat tappet cams.
enough to worry about valve seats and no lead
enough to deal with alcohol in gas

DUB

I used to use this...but I did not like the short life and quick oil change interval time. I think it is 3 months/3000 miles...the last time I called them and checked.

VS,

YES..I really do not use it that often but on some engines it seems to allow for a bit better oil pressure when it is at operating temps.

DUB

leadfoot4

Until all of the engines in my garage required synthetic oil, which is obviously recent, I followed the same practice, and yeah, I, too, was doing it since the 70s...…...

FINWOLF

I'm more concerned with the zinc for the cam I wont do 3000 miles in a year so that is ok. In pa I don't get to drive it year round. But the 3 months is a good thing to know. Thanks for the heads up on that.