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I have been using 5w30 for years just like Ford says to in the 1995 Ford 3.8 V6 Windstar. Just got a rebuilt engine 6K ago due to the old one having a cracked block. Went to the Mobil site and they say use 5w20. Before that I replaced Mobil 1 5w30 with 0w40. Seems to run a lot smoother and...

Does anyone have reliable guidance on the grade of oils recommended on newer cars outside the U.S.? I read in another thread that 15w50 may be recommended for Toyota 2.2 engines. Specifically, I'm looking for recommendations for the 3.0 V6 in 97-01 Toyota's. Does anyone know what they...

The first numbers are from Valvoline Synpower 10w30 SJ last October. It is also in another thread. First oil fill and drain after AutoRx and Castrol 5w30 for 600 miles mixed highway and city driving over 4 months in hot Montgomery AL weather. Consumed 1/2 quart of oil. None added. Towed a...

Just got my analysis back from Schaeffers. The first analysis was Mobil 1 5w30 Oct-Nov. Interval 2,600 miles / 115,000 miles on vehicle. Mostly highway miles. Consumed 1 1/2 quart of oil and 3/4 quart of Castrol 5w30 added during interval. I ran chevron techron and, later, Berryman's B-12...

do a search for "Auto-Rx", "lubecontrol", "neutra", or any other engine cleaner. Sounds like sticking rings if your lucky. IMHO, the Auto-RX would be the most effective remedy with no risk to your engine. Disclaimer, I have used Auto-Rx and neutra. I don't sell or personally know anyone who...

How would a good dino oil perform with 1 oz. of neutra added every 1k to 2K miles? Would it act like lubecontrol and add extra solvency? Would wear over the drain interval (6K) be reduced? Would deposits be lessened? Maybe it would be as good as adding the Auto-Rx maintenance dose.

Automaker to Upgrade ATF Specs By Lisa Tocci (COLORADO SPRINGS, Colo.) Saying that many automatic transmission fluids today are inadequate to meet its service life and performance goals, General Motors this week unveiled a significant upgrade to its Dexron III ATF specification. The move will...

I just read Bob's info on the ISO-Syn process that makes Group III oils. Here is some of it: Very good to excellent oxidation stability due to their high saturate content. Very good low volatility characteristics due to their high saturate content and the lack of lighter molecular ends...

Any comments on the quality or usefulness of this product? Can a Dexron III transmission get a benefit from an additive that is a "friction modifier"? Are Mercon V qualified products bad for a Dexron III transmission? As you can see I'm very confused on what if anything I should add to my...

The first analysis showed a coolant leak and the second is after prestone stopleak. Blanks on the second set of numbers were blank on the form. I wish sodium and potassium had been measured. second numbers are with a Bosch premium filter and mixed city/highway driving Schaeffer oil sample...

I'm no chemist but I've been reading about the Ester component in a synthetic having a similar purpose to the Group I component in a dino oil. MolaKule was kind enough to tell us a great deal about esters. My understanding is additives are held in the Ester or Group I and they also provide...

There is much talk about how Bobistheoilguy's oil analysis with a Fram filter is better than with the Mobil 1 filter. I wonder if we can better the results with a bypass filter. Hopefully Bob will want to go through the pain of installing one. I would like to help support the site by getting...

Valvoline Synpower 10w30 SJ First oil fill and drain after AutoRx and Castrol 5w30 for 600 miles mixed highway and city driving over 4 months in hot Montgomery AL weather Towed a trailer for 200 miles

Buy the gallon jug and use a 12 oz. bottle to measure the dose. Probably cheaper.

What brand are you going with then?

Just changed ATF in a 2001 Camry V6 at 16K The fluid looked thick, and dirty, almost like blood. Very deep red. Yuck. The new fluid is considerably clearer and pink. The old fluid was easy to read on the dipstick and the new very hard to see (clear). Did I wait too long to change? I thought...

PPDs address changes in industry formulations and technological developments. By: Katherine Bui Low-temperature-performance technology has been challenged these past few years. In many ways, it is a wonder that research in pour point depressant (PPD) and viscosity index improver (VII)...

Just took the Windstar in for new spark plugs. Brought my mechanic platinum Bosch (dual posts) and he told me that I was going to have poor gas mileage. He recommended autolight. I'm not a big fan of Autolight, but they look like the Motorcraft he replaced (112K on them, I know I waited too long...

Johnny tells us that the major players in oil use Group II or Group II+ exclusively in thier dino now. Even the blends use Group II with Group III/IV in small amounts. Do refiners still have Group I oil to off load somewhere? Where does it go? Are any oil marketers using this group I?

Johnny, Just read specs of the Heavy Duty 10w30 web page HTHS 3.5 Beats the regular oil and is, in some ways, better than the synthetic (Group III) Some will poo poo the HD diesel purpose of the oil, but I like it Haven't seen it at Walmart. Where do you find it? [ August 06, 2002, 12:36...