Switch to Dino when ?

[Ndx]

At how many kms i should switch back to Conventional ?
I will be running RP. I have 90000Km on Engine ...

Auto-RX website states that ... Synthetic makes seals to leaks.
So I wonder when car will be old enough that Conventional will be better for it ..

 

[mechtech2]

Concern yourself with extreme cold weather starting.
If the seals are not leaking then it is not an issue, but cold oil flow is.

 

[PandaBear]

When Dino is on sale and Synthetic is not.

 

[jerseygeorge]

Originally Posted By: Ndx

Auto-RX website states that ... Synthetic makes seals to leaks.
So I wonder when car will be old enough that Conventional will be better for it ..


Makes seals leak?? That's something I have NEVER experienced running synthetics.....since 2001!

 

[OVERKILL]

Originally Posted By: jerseygeorge
Originally Posted By: Ndx

Auto-RX website states that ... Synthetic makes seals to leaks.
So I wonder when car will be old enough that Conventional will be better for it ..


Makes seals leak?? That's something I have NEVER experienced running synthetics.....since 2001!


It's more that the additional cleansing that Synthetic oils tend to do, that causes would-be leaks or very small leaks to become epic in nature in a very short period of time.

When I got my '87 GT, It switched it to Mobil 1. Within a month, the valve covers were absolutely POURING oil, and the rear main seal was leaking.

Now, the valve covers had a VERY small leak before that. I have no idea about the rear main. Engine had 240,000Km on it when I bought the car, had been well maintained, but these gaskets/seals were ORIGINAL 18 year old parts.

I replaced the valve cover gaskets, and did the rear main (which wasn't leaking a LOT, but would leave a drop or two when the car sat) and the car leaked no more. And hasn't since.

I am hardly unique with this example. With older cork gaskets, hard as a brick and sealed with sludge....You remove that sludge, things are going to leak.

 

[dan3952]

I think most importantly don't *overfill* in switching from conventional to synthetic, particularly on an older car. I, last year, misread the oil level reading by a large margin somehow and ended up putting 0.5 qt too much Mobil 1 in my crankcase. Next day, the rear main started leaking. Once I had reduced the level and gone on to my next oil change, there were always a few drops in the vicinity of that seal.

Unrelated to my above comment, with a car that has 211,000 km, I find I burn a bit less when I run synthetic instead of conventional (not much less)

Originally Posted By: jerseygeorge
Makes seals leak?? That's something I have NEVER experienced running synthetics.....since 2001!