best method for thickening Chevron 10/30 a bit???

[97tbird]

Hi all,

I'm running Chevron supr.10/30 in my Ford 4.6L right now(in Arx rinse phase), and I'd like to keep using it also when it gets warmer, and in summer.
For this, I really would like to thicken it up a bit...say somewhere around 12cSt@100 or so...somewhere between a 10/30 and a 10/40.

What would be the best Chevron oil to use for this? Chevr.10/40?
or Delo400 15/40?(those are the only Chevron products I can find in Walmart)
What would be a good ratio to mix?(capacity with filter is 5.5 qts)

Also, are there any other (dino)10/30 oils which offer better "thickening-up" or mixing possibilities?
(..I can get Pennzoil dino 10/30, 10/40, 20/50 and LL-15/40 at Wally, also Pennz.HM 10/30 and 10/40)

Any suggestions/ideas are thankfully welcome.

 

[KW]

You could mix in a quart or two of 20W50 to the 10W30 to thicken it up. Or use the 10W40/15W40 oils.

 

[ToyotaNSaturn]

I have a UOA that I just posted using Delo 400 with Chevron Supreme. I suggest 2qts Delo 400 15w-40 and 3 quarts 10w-30 Chevron Supreme.

 

[sbc350gearhead]

What about schaeffer's EP 132?

 

[TallPaul]

It was posted at this site last month that mixing two oils of different viscosity results in a viscosity lower than the arithmetic mean. So perhaps you want to mix a larger quantity of the xw-40 (say 3.5 qts) oil into a smaller quantity of the xw-30 (say 2 qts). That might get you pretty close to right between a 30 and a 40.