Re: Question on head gasket and oil additive
 

The motor oil is now named Amsoil Signature Series 0W30. The also have a 0W20.

Re: Question on head gasket and oil additive
 

Castrol also frowns on using any additives with their oil. As the rep stated " why undo something that our chemists have engineered into our oil ?"

Re: Question on head gasket and oil additive
 

Those are not the same oils. The Dominator Series is new as of last year and are fortiufied more for the racing environment. The Signature Series 0W-30 may have gotten reformulated a year or two ago. I'm only speculating, but it may have to do with newer model emission regulations and compatibility, similar to a new diesel formulation for 2007 & newer diesel trucks. I believe the zinc content has something to do with it. The race oils, older diesel, including the HDD 5w-30, and some of the others, still have a large amount of zinc and similar additives. It's all good stuff nonetheless.

Re: Question on head gasket and oil additive
 

I would have to agree with Alan on the head gaskets. I have used Cometics on our 283 and 327s and reuse them 3 times, then I take them off and save them. I probably could use them again. They get pretty reasonable when you get to use them more than once. You tell them the bore size and thickness and they take care of it.

Re: Question on head gasket and oil additive
 

The product I was referring to was either the Series 2000 (or might be 3000) and they are a different product line from the Dominator series; it looks like they renamed it but I have to check with tech to verify it. And you know that the chemistry will work either way.

Re: Question on head gasket and oil additive
 

I have head gaskets you are looking for if you are interested. email theshop@texomaonline.com

Re: Question on head gasket and oil additive
 

I appreciate it, but once I found out that the 7733SH1 was the replacement...I got it and I believe it is what I will use at this point. I am hoping to have her running in about a week...so as my normal price and time estimates go it will probably be about 2 weeks and twice the costs that I had orignially planned for.

Re: Question on head gasket and oil additive
 

((I am building a 307...just trying to go a couple tenths under...hopefully. This engine will not turn over 6000rpm to speak of, the piston rock is approximately.005 and on the high end it sits about .002 in the hole. ))
7733SH1 aprox .015, with your .002 makes .017...gonna hit. let me know what you see when it comes appart...

Re: Question on head gasket and oil additive
 

Well, I have been scared away from making the clearance that tight...I just am trying to get as much out of everything as possible and taking thousandths away from the piston to head clearance will definitely increase compression which is definitely a gain of some sort. I decided to go with a .028 thick gasket which will yield about .030 clearance.

Re: Question on head gasket and oil additive
 

Mobil/ Mobil 1 makes the base oils for all synthetic oils. I used to sell race oils. When you read the specs for synthetic motor oil and compare them all, this is what you will find: everyone has a hard one for additives that makes their oil different. When you look very close, many are only slightly different competitors to Mobil 1. They really only offer slight advantages. Most are only noticeable in lab reports. SAVE YOUR MONEY. Brad penn 0-30,10-30 semi synthetic and Valvolone VR1 are the best for the $ spent. Amsoil does offer a oil analisys that will answer any questions about the oil you are using. They contract with a private company. You can deal with this company direct. OH BY THE WAY, ask 50 racers about oil and you'll get 53 answers.