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How does Castrol Edge 5w30 compare to Amsoil XL 5w30 and Mobil 1 5w30.

Never thought oil made a difference in engine noises. Been using Mobil 1 in the vette of course. Amsoil in everything else I own. Finally said to heck with Mobil when I was ordering oil and ordered Amsoil XL 5w30 for the vette. Darn if not cold and hot its quieter. The little mechanical noises...

A guy on one of the Dodge truck forums insist that extended mileage motor oils get THICKER the longer and more miles they are used. He says "Be wary of any "extended" use oils, especially the Amsoil product IF USED FOR EXTENDED INTERVALS. They all show that they get "thicker" over extended...

Comparisons please. Been using Mobil 1 in my 2008 Corvette with 6.2. Been using Amsoil XL line in my other two gas burners. A 2009 Hemi and a 2010 Gran Marquis with 4.6. Thinking wanting to use the 5w30 Amsoil XL in my vette instead of Mobil 1.

I do have this posted in the ATF section. Just needing a little more info. Thought I might get it here. I have a minor debate about synthetic transmission fliud going on elsewhere. I say that ATf+4 is NOT a high end synthetic trans fliud. I can tell just by PRICE. Not a great way to judge but I...

I know ATF+4 is considered a 'synthetic'. Is it by wording alone? How does it compare to the high dollar boutique ATFs? Amsoil,Mobil etc.? I'm dubious its in the league of the 'high dollar' synthetics. Just the price of alone tells me such.

My 2006 Corvette with 6.0 and 22500 miles had developed a pretty loud clack noise after cold start and would go away during warm up.Past two weeks. Its just about a daily driver. Sounded like one lifter. Its had Mobil 1 once a year or by oil life monitor. This oil/filter was done in July and had...

I have a 03 Dodge Dually Cummins diesel.Its been driven 3k in two years in fact its about 2.5 years.The 3k is pulling a 4600 lbs trailer sometimes with a horse or two in it or feed etc.It gets up to operating temp and I make sure at times EGT up there.SHOULD I CHANGE OIL YET? It still looks like...

I'm 55 years old.Been working and fooling around with autos since about 15.I never have swapped brands of oils or shopped price like I read about on this site.I never had friends that did.I did have customers that did a lot.I find a brand that I think works best in a certain vehicle or equipment...

After sitting 24 hours my 09 Dodge Ram with 5.7 Hemi has lifter rattle.Last solid 1 or 2 seconds. Did not do this until first oil change at 2500 miles.Now has 3800 miles.Amsoil 5w20 XL and a Wix oil filter.Takes sitting more then overnight to rattle.It sat for several days at a time before the...

Just how many are out there? What brands? The ones that CALL themselves synthetics but are group 3 to me seems false advertising.

How much differance in the two.Which would you use in a 6 month drain interval or less then 7500 miles? It will be used in a 09 5.7 Hemi.

Just bought a 09 Dodge truck with 5.7 Hemi.How is this engine on oil? Anything interesting or not about these Hemi's?

Whats involved in servicing a 06 2.2 litre Cobalt automatic transmission and what fliud?

Have a friend with a 06 Cobalt.4 Door,heated seats,aluminum wheels,automatic. Whats due at 90k to 100k? How does the 'sealed'trans get serviced? Spark plugs? Serpentine belt? Cooling system? Can anybody give me the skinny on this car? Thanks.

I have a 1998 Dodge 1500 v8 automatic.It has 94k on it now.At 40k I did a fluid exchange with AMSOIL ATF and added a trans cooler.At 60k did a filter change and top off with AMSOIL ATF.Now at 94k the fluid was a grape purple.I sent a sample to BLACKSTONE LABS.REPORT SAYS "Wear read...

The Amsoil ATF in my 1998 Dodge 1500 318 with a large ATF cooler has turned a dark cherry color.Its still tranluscent and smells ok.I did a total ATF replacement at about 40k with Amsoil ATF and at 60k did a filter and make up fluid(Amsoil).Now I'm at 94k.With the FACTORY fluid I had some torque...

Is it a real synthetic? Group 3 or 4 is my question.

Had a 2000 Mercury Gran Marquis with 4.6 and now have a 2006 with same engine.The NEW 06 states 5w20.My OTHER vehicles state a 10w30.Been using Amsoil full syn.10w30 for ages.Should I stick with the 5w20 in the 06 OR can I continue with the 10w30 in the 06 as with my other vehicles.I prefer to...

Vet I use has a 1967 Tr4.Had engine rebuilt never drove and put in dry storage for 5 years.Anyhow just got MORE work done and auto is back on the streets.What WEIGHT OIL does this car need.He has no clue.Runs great,smokes some and holds 7qts?