or is it just highmileage oils in conventional, blend or syn? i am curious if reglular mobile 1 syn has seal conditioners
do all synthetics have seal conditoners ?
- Thread starter mikeg5
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Not enough for my car. I was a purist synth user thru the mid-90's, but then I developed my first leak (oil on driver way). I even went to M1 15w50 - still leaking (plus my consumption rate was becoming a bit high to justify synth.) Went to regular dino - leak stopped, never returned (later went to HMs due to smoke).
depends some Syns will use ester type additives for additive solubility which will give a secondary seal swell effect but probably not as much as a HM oil will.
bruce
bruce
but syns arent as bad on seals as dino correct or are there no real correlations??
no real correlations I would say lube blends are all over as far as seal swell or lack off no way to really tell.
bruce
bruce
I would add auto rx to any synthetic as a seal conditioner.
i dont need it i have a yota lol with 91k miles i was just asking and no i wouldnt add an oil additive.. no real need in them.
What is the primary seal condition agent (dino or other)? And do HM oils simply use more of it, or something different?
ETA: I've always heard that syns were harder on seals than dino, just trying to know what any differences are.
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What is the primary seal condition agent (dino or other)?
Di or phalate esters
And do HM oils simply use more of it, or something different?
yes more
Di or phalate esters
And do HM oils simply use more of it, or something different?
yes more
To my knowledge, only Mobil 1 HM and Maxlife full synthetic are the only two synthetic oils on the market with seal conditioners.
I don't think you can be so general. However, contrary to popular belief all modern oils are fairly "easy on seals". And as usual in extreme conditions, synthetic oils by staying more fluid in cold exert less pressure on seals and in extreme hot (say turbos) don't coke and crust, and thus abrade seals.
Would explain why the rubber stopper in a plastic syringe swelled to the point that it froze in the tube when I had Phthalate based lube in it!!
A true synthetic is cleaner and will not leave any where near as many deposits behind. Deposits are what kill seals quickly. the only seals that synthetic are hard on is old cheap rubber seals. If their is an OEM still useing BUna seals in their engines they owe you a refund! So many oils are GII+,GIII,GIV,GV blends that it is hard to say how much of any of these are in any oil.
All oils have some form of seal swelling agent in them since almost none of them use much GI anymore. The extra solvents in GI left over from refineing combined with the all the other junk that was left in from it's natuaral state greatly reduced the need for seal swelling agents.
All oils have some form of seal swelling agent in them since almost none of them use much GI anymore. The extra solvents in GI left over from refineing combined with the all the other junk that was left in from it's natuaral state greatly reduced the need for seal swelling agents.
Modern seals made from various florocarbons are basicly not affected by oil types or automotive solvents. Nitril,Viton,Teflon are the three main seal materials used today along with RTV wich is silicone based.
Esters will swell seals in all type of equipment. The correct amount of ester in lubricants should swell seals 1 1/2 to 3%. If there is too much ester in a lubricant it will swell seals too much this creates the chance for the lubricant to flow past the seals. Also not enough ester will have no effect to seals. PAO based lubricants will shrink seals so esters are used to reverse this reaction when blending PAO based lubricants.
mikeg5,
I have an 89' Toyota Camry with almost 250K on it currently.
For most of it's life I've been using exclusively Mobil 1 either 10W-30 or recently the 5w30 weight to help save a few pennies. Once per month I religiously check the oil level and add if necessary to the full level. For the past 4 check-up/checks I've noticed a decline is oil consumption!!!
Today I didn't need to add any what so ever so I pretty happy that my high mileage car nether leaked nor consumed any oil. Perhaps synthetics so have conditioners built in to give the seals longevity. I don't use the M1 "extended". Just the conventional M1.
Have a great 4th!!!
Durango
jdean, if your statement was 100% correct all of use that use 100% ester based oils would be in big trouble!
john browning, all esters are not the same, there are pages of different esters available to blenders. I have seen some of the major manufacturers use up to 16% of ester. Others as little as 3-5%. The type of esters you might be referring to are designed to be used full strength. It depends on the equipment and the application and type of material used as a seal.
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mikeg5,
I have an 89' Toyota Camry with almost 250K on it currently.
For most of it's life I've been using exclusively Mobil 1 either 10W-30 or recently the 5w30 weight to help save a few pennies. Once per month I religiously check the oil level and add if necessary to the full level. For the past 4 check-up/checks I've noticed a decline is oil consumption!!!
Today I didn't need to add any what so ever so I pretty happy that my high mileage car nether leaked nor consumed any oil. Perhaps synthetics so have conditioners built in to give the seals longevity. I don't use the M1 "extended". Just the conventional M1.
Have a great 4th!!!
Durango
M1 synthetic or the mineral oil??
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