Recent content by MojaveK20

I bought my Goodyear Wrangler AT's at Walmart. $150 per tire, good price, bought two five quart jugs of Castrol GTX while I was there too.

I bought an 85 K20 Suburban in 1994 at a GSA auction. It had 70,000 on it. Don't know what oil the Forest Service used but I put another 245,000 on it using Castrol conventional oil. Put in a new Goodwrench 350 a year ago and expect to get a heck of a lot of miles out of it. Using Castrol GTX now.

so synthetic 5w30 flows better in the cold than conventional 5w30? huh?

Originally Posted By: expat I have an 84 Toyota Pickup, I intend to have this truck a very long time. My previous Toyota went through 7 Walker mufflers and tail pipes in the 16 years I owned it. The replacement mufflers were free, but I got fed-up installing them, and buying new Tail pipes. Does...

Originally Posted By: ledslinger This question reveals a dilemma for suppliers of replacement engines for older cars. They are going to have to make very specific oil recommendations for flat tappet replacement engines. Most do not have high spring pressures or fast opening cams so the problem...

Been using Castrol GTX 10w30 for a year in my new a year ago Goodwrench 350 flat tappet engine. Had to get some front diff work on the Suburban yesterday and the topic of ZDDP came up and the mechanic said I had already ruined the engine by using Castrol GTX without adding a ZDDP supplement. So...

Why does GM warranty my new Goodwrench 350 flat tappet engine for 36 months or 100,000 miles if the current oils are "deficient" in ZDDP?

Considering this oil. http://www.summitracing.com/parts/SUM-MGSAE30/ I have a brand new 350 crate motor that has been on Castrol 10-30 since start up 10,000 miles ago. Is the extra ZDDP necessary for new flat tappet engines or just at break in.

Originally Posted By: Lon 5-30 the cold temps we get here in Wisconsin in January killed a couple of front crank seals with my 90'Montero the last couple of winters at -22.Have since switched that one over to Motorcraft semi-syn 5-20 and hopefully wont have to change that seal for many more...

I got 316,000 hard miles out of a 350 in a K20 Suburban changing the oil every 3000. The mechanic that installed my new engine in the Sub recommended the same thing considering where I live and work. 3000 miles with dino for me.

Originally Posted By: Bill in Utah Originally Posted By: MojaveK20 Is there a special additive we need start using during the "oil break-in" period? Nope. Just change the oil and filter. I'd go a shorter OCI for the first one since there is going to be more metals and contamination in the...

Is there a special additive we need start using during the "oil break-in" period?

The original engine in my '85 K20 Suburban lasted 316,000 miles with 3000 mile oil/filter changes. The new engine has 1,695 miles on it as of today, so I have 1,305 miles til the oil gets changed.

Originally Posted By: buster Originally Posted By: Vincent_Vega PP is the only oil that I have used in my 05 F150 that has actually needed a make up qt. I have 30,000 mile on my truck and all oils that I have used MC, Mobil1, Royal P, and regular old Havoline ( all in 5W20) never needed any top...

Originally Posted By: MojaveK20 For the last 14 years my 85 K20 Suburban with a 350, 4 speed manual and 4.10 rear end has consistently averaged 15.2 mpg if I keep it at 60 mph. With the new engine I am getting 14.8