[Toy4Chris]

Can anyone give me some input as to whether there is any benefit to using 10/30 synthetic oil over conventional oil? The price for sythetic is not all that much more, but don't want to waste money. Any IDEAS?

Thanks
Chris

[Toy4Chris]

Can anyone give me some input as to whether there is any benefit to using 10/30 synthetic oil over conventional oil? The price for sythetic is not all that much more, but don't want to waste money. Any IDEAS?

Thanks
Chris

[Goatracer1]

I use Mobil 1 in my cars. When I took the engine out of my street/strip 1967 GTO to freshen it up after 6 years of racing there was no measureable wear. That was good enough for me.

[Judge not]

After engine break in, I would switch to synthetic. It is the best oil you can buy, as you already stated, it does't cost that much more. Tried to post a web site but here is the address. WWW.bobistheoilguy.com

[aj66gto]

Being that your engine was sitting for a while. You might want to put conventional oil in first. Run it some and then change the oil with a new oil filter and the synthetic oil in then.

[Toy4Chris]

Is all synthetic REALLY full synthetic oil?
What brand do you think is best. They all seem to make a synthetic, with Mobil one being the most expensive by far.
Thanks Chris

[Rugratman]

Will changing from conventional oil to synthetic oil affect oil preassure?
Maybe a silly question, but worth asking.

I am toying with adding a remote oil filter to my 67 GTO, and just doing my homework.

Just drain out the conventional oil and replace with the synthetic?
Is there a wieght difference? Say from 10w - 30.

I have never used the syntheic oil before. I just used to change the oil every 1000 miles or so.

[aj66gto]

I'm not sure if ones better that the other. But I would tend to think that there all about the same.

Why not ask your boss?? He should know..

[Junkyard Dog]

Flat tappet or roller?

[gtoformula]

Yes. Synthetic leaves a film on moving parts better than mother nature oil which is better for start ups. Particularly if the engine sits periods of time between starts. That's why I run in 4 of my 6 cars. It also does not break down as quickly as normal oil and releases particles and impurities more easily to the oil filter. Does just about everything better than regular oil.

[The Gunny]

How much break-in on a fresh engine before swiching

[TransAm525]

Yes. I run Mobil 1 synthetic oil and transmission fluid (auto cars) in all my vehicles. Gas mileage went up about 1 mpg after the change. FWIW, when I had my old Corvette, the oil pressure increased about 7-10 psi and the oil temps dropped from 240 to 180-200 degrees. Synthetic is well worth the money.

[John Payne]

As a rule of thumb..don't add synthetic until approx 1000 miles of breakin on a rebuilt engine.

[DAVE RIBEIRO]

You need to put 100-200 miles on the street and 8-20 passes down the 1/4...There is no real magic number,but those will put you in the ballpark..
There is isn't enough difference between the Oil companies,Mobil,Valvoline,Castrol,Pennzoil,
etc.Avg. cost about $3.75-4.00 per Qt.(Sam's-Costco,etc.) Racing only, Royal-Purple,Red-line,
Amsoil are about $6-10 per qt.
Be sure it says Full Syn. not a Blend !!!!
I have even used Wal-marts (Full-Syn) Something Tech label in my street cars..Works very well and costs$13-14 per 5qt container..
Hope this helps you in your project..I have found Wal-Mart,Sam's has best everyday prices on Oil,unless you get it free.......
Dave...1033/stock

[Toy4Chris]

Thanks for all the help guys with this topic. Seems like alot of other epople may have been considering the same thing.

[70 Dream]

What is the best viz?

I've been running 15-40 Valvoline High Mileage conv oil in my GOAT original engine.

What would be the best comparable syn oil?

[RPM]

One oil comparable to what you are using now would be Delvac 1 which is a synthetic HD oil.

[Hooter]

On this subject, anyone know why some of the cam manufacturers don't recommend synthetic? Not sure which one, but remember one of them stating not to run synthetic. I've got a big solid in my new motor and plan on changing over to Mobil 1 along with 1 bottle of EOS after a few hundred hard miles.

[Formula8]

All current spec motor oil including synthetics have reduced zinc disulphide (or something like that) to reduce contamination to the converter and as most vehicles have roller valvetrains, the additive is not necessary.

I can't confirm but I believe STP is loaded with the stuff and completely compatible with sythetic oils. So the best solution appears to be to be break your engine in with standard oil, then after the rings set, spike your synthetic oil cocktail with STP.

[jamesgennock]

Yes! Synthetic oil. Full service at Walmart is 30 bucks. Can't beat it, plus the kids get a kick out of my old car and they try extra hard to do a good job. When I worked at a tire store the cool cars I worked on made my day.