I use Castrol GTX/High Mileage in my pickup..
Royal Purple 10W30 in the 'Maro.

 

I agree that changing oil regularly is much more important than what you put in it. I also am NOT an advocate of mileage based changes, unless you can't tell the difference between what oil should look like and what broken down, burned oil looks like.

Now I'm not advocating waiting for it to look old and smell burned, but I regularly run full synthetic (Shell Rotella) in a Dodge Diesel, Geo Metro and the Toy Pickup. Keep an eye on it and I can routinely run 5,000 or more miles before it even looks tinted.

I do believe in quality filters, mobile one, K&N are my favorites (They may be made in the same factory?).

 

I use the Wix filters the large ones . As for oil castrol 20/50 in all the 22rec engines and 5/30 in the 3.4

If I had a engine burning or leaking oil I would use the cheapest oil I could buy till the problem was fixed one way or another.

 

I agreee with using the Castrol 20/50. It works real well here in Texas where we go from monsoon to blizzard in one week. I also agree with the consensus here that Fram is not the best you can buy. I have been using Purolator or STP oil filters. Both seem to work very well for me.

 

fram is junk,do a little research thru the sites.The K&N,Mobil 1,and wix had the best filtration and thicker case.Fram failed the test.

 

We've been using Brad Penn 10w30 and wix filters for years

I also agree that oil quality is something you should not skimp on

 

For those of you talking about using Castrol 20W50, you need to keep in mind that you live in warm climates otherwise 20W50 would be way too thick.

I ran 20W50 in a couple of old 22re's when I lived in California but now I live in Leadville Colorado which is at 10,145 feet above sea level so anything more than 10W30 is too thick for my 22RE at this altitude.

Right now I'm using Castrol GTX High Mileage 10W30 with a Toyota filter. I've thought about switching to Amsoil but I'd rather not risk any leaks and my truck seems to like Dino oil anyways, it's made it 20 years on it so...

 

The complete story:

At my Texas Walmart yesterday found a Purolator in the Super Tech box. This is good.

Champion Labs has been the supplier for Super Tech. It has been good.

When one has been around filter manufacturers and oil refineries as much as I have one learns. A mere glance at any oil filter tells me who made it.

For oil selection, API designations and the API starburst tells the whole story. Without these flags using is a resounding "no". With these flags, take your pick.

We don't know who put the oil in the bottles at Walmart. I've seen Texaco Havoline bottles filled at Citgo in Chicago and Motorvator (Kmart) bottles filled at Quaker State in West Virginia. Dexter petroleum in New Orleans saw Castrol as it's biggest customer at my last visit.

Shipping costs prevent Valvoline from shipping oil from Kentucky to Walmart in Central Texas. Valvoline will pick up the phone and call Exxon in Baytown to fill Valvoline bottles for regional distribution. Valvoline might specify a certain additive package. They might not.

I was on the scene circa 1995 to watch the Pennzoil-Conoco startup venture for Group 2 base stocks in Lake Charles. Pennzoil patented "Purebase" and Conoco adopted "Hydroclear". The refined oil looked like a glass of ice water at Denny's. No other bottler adopted a special name as Group 2 and Group 2+ base stocks are now the norm industry wide.

Pennzoil used an exclusive additive package while Conoco used a common additive package. Poring each into a lab beaker showed the much darker Pennz.

In 2002, Shell bought Pennzoil-Quaker State and threw the Pennz exclusive additive package in the dumpster. Pennz is now factory fill for all Chrysler engines.

Fram is working hard to upgrade. I'm not quite ready to endorse. Wix in Gastonia, NC is where I find the most conceintious. The Wix cats try really hard to make the very best in the world. Wix is pricey. NAPA Silver is a short changed Wix. NAPA Gold is pure Wix

Every bottle we see on U. S. shelves is a 1 liter bottle, although the bottle contains 1 U. S. quart (946mL). At least the bottle is supposed to contain 1 quart. I have found and have mechanics tell me they have found a liter in the bottle. Mobil was first around 1995 and Conoco was last to switch to the bigger bottle around 2002.

2000 mile oil changes are overkill under any conditions except NASCAR. Try 3000 miles.

Pennzoil Full Synthetic from natural gas is now the best engine oil world wide.

Hope this helps.