[Shop-talk] Question about an engine.....

[Bob Spidell]

Synthetic oil does not 'destroy seals.' It's 'slipperier' than dino oils, so can get past seals and cause some additional leaking (or new leaking). 

A quart in 5 is gonna make no difference whatsoever as long as you used the same viscosity (dino-synth blends work quite well). If you're losing sleep do an oil change and forget about it. 

re: 'most likely a blend butstill not full synthetic' 

It it's a blend it will say so on the label, and it'll cost a little more than straight dino. 


Bob 

----- Original Message -----

... 

.....that has not had 
synthetic oil before. 



I have an 02 Highlander 
with ~185K miles on it. It has turned out to be a 
lemon and we are not 
wondering if the Carfax we saw was fakedlong story about 
all that Ive had to 
do this this vehicle since we got it. We've had it for 
about two years. 
I've done most of the oil changes and all have used only 
regular dyno oil (most likely a blend but 
still not full synthetic). The other 
day I topped up the oil, adding about half 
a quart, and realized too late that 
I had grabbed a quart of the full synthetic 
I use for my daughters car. 



Ive read that switching to 
full synthetic from regular oil can destroy the 
seals. Is this actually true? 
And if so, is about half a quart added to a five 
quart capacity engine enough 
to ruin seals? 



I ask this because in the 
past couple weeks Ive notice that this thing is 
now leaking pretty frelling good. I have several spots under it now where the 
oil is dripping. 



Thanks guys 


tim 
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